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[thirdparty/cups.git] / scheduler / client.c
1 /*
2 * "$Id: client.c 7950 2008-09-17 00:21:59Z mike $"
3 *
4 * Client routines for the Common UNIX Printing System (CUPS) scheduler.
5 *
6 * Copyright 2007-2010 by Apple Inc.
7 * Copyright 1997-2007 by Easy Software Products, all rights reserved.
8 *
9 * This file contains Kerberos support code, copyright 2006 by
10 * Jelmer Vernooij.
11 *
12 * These coded instructions, statements, and computer programs are the
13 * property of Apple Inc. and are protected by Federal copyright
14 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
15 * which should have been included with this file. If this file is
16 * file is missing or damaged, see the license at "http://www.cups.org/".
17 *
18 * Contents:
19 *
20 * cupsdAcceptClient() - Accept a new client.
21 * cupsdCloseAllClients() - Close all remote clients immediately.
22 * cupsdCloseClient() - Close a remote client.
23 * cupsdFlushHeader() - Flush the header fields to the client.
24 * cupsdReadClient() - Read data from a client.
25 * cupsdSendCommand() - Send output from a command via HTTP.
26 * cupsdSendError() - Send an error message via HTTP.
27 * cupsdSendHeader() - Send an HTTP request.
28 * cupsdUpdateCGI() - Read status messages from CGI scripts and
29 * programs.
30 * cupsdWriteClient() - Write data to a client as needed.
31 * check_if_modified() - Decode an "If-Modified-Since" line.
32 * compare_clients() - Compare two client connections.
33 * data_ready() - Check whether data is available from a client.
34 * encrypt_client() - Enable encryption for the client...
35 * get_cdsa_certificate() - Get a SSL/TLS certificate from the System
36 * keychain.
37 * get_file() - Get a filename and state info.
38 * install_conf_file() - Install a configuration file.
39 * is_cgi() - Is the resource a CGI script/program?
40 * is_path_absolute() - Is a path absolute and free of relative elements
41 * (i.e. "..").
42 * make_certificate() - Make a self-signed SSL/TLS certificate.
43 * pipe_command() - Pipe the output of a command to the remote client.
44 * valid_host() - Is the Host: field valid?
45 * write_file() - Send a file via HTTP.
46 * write_pipe() - Flag that data is available on the CGI pipe.
47 */
48
49 /*
50 * Include necessary headers...
51 */
52
53 #include "cupsd.h"
54
55 #ifdef HAVE_CDSASSL
56 # include <Security/Security.h>
57 # ifdef HAVE_SECIDENTITYSEARCHPRIV_H
58 # include <Security/SecIdentitySearchPriv.h>
59 # else /* Declare prototype for function in that header... */
60 extern OSStatus SecIdentitySearchCreateWithPolicy(SecPolicyRef policy,
61 CFStringRef idString, CSSM_KEYUSE keyUsage,
62 CFTypeRef keychainOrArray,
63 Boolean returnOnlyValidIdentities,
64 SecIdentitySearchRef* searchRef);
65 # endif /* HAVE_SECIDENTITYSEARCHPRIV_H */
66 # ifdef HAVE_SECPOLICYPRIV_H
67 # include <Security/SecPolicyPriv.h>
68 # else /* Declare prototype for function in that header... */
69 extern OSStatus SecPolicySetValue(SecPolicyRef policyRef,
70 const CSSM_DATA *value);
71 # endif /* HAVE_SECPOLICYPRIV_H */
72 # ifdef HAVE_SECBASEPRIV_H
73 # include <Security/SecBasePriv.h>
74 # else /* Declare prototype for function in that header... */
75 extern const char *cssmErrorString(int error);
76 # endif /* HAVE_SECBASEPRIV_H */
77 #endif /* HAVE_CDSASSL */
78
79 #ifdef HAVE_GNUTLS
80 # include <gnutls/x509.h>
81 #endif /* HAVE_GNUTLS */
82
83 #ifdef HAVE_TCPD_H
84 # include <tcpd.h>
85 #endif /* HAVE_TCPD_H */
86
87
88 /*
89 * Local functions...
90 */
91
92 static int check_if_modified(cupsd_client_t *con,
93 struct stat *filestats);
94 static int compare_clients(cupsd_client_t *a, cupsd_client_t *b,
95 void *data);
96 static int data_ready(cupsd_client_t *con);
97 #ifdef HAVE_SSL
98 static int encrypt_client(cupsd_client_t *con);
99 #endif /* HAVE_SSL */
100 #ifdef HAVE_CDSASSL
101 static CFArrayRef get_cdsa_certificate(cupsd_client_t *con);
102 #endif /* HAVE_CDSASSL */
103 static char *get_file(cupsd_client_t *con, struct stat *filestats,
104 char *filename, int len);
105 static http_status_t install_conf_file(cupsd_client_t *con);
106 static int is_cgi(cupsd_client_t *con, const char *filename,
107 struct stat *filestats, mime_type_t *type);
108 static int is_path_absolute(const char *path);
109 #ifdef HAVE_SSL
110 static int make_certificate(cupsd_client_t *con);
111 #endif /* HAVE_SSL */
112 static int pipe_command(cupsd_client_t *con, int infile, int *outfile,
113 char *command, char *options, int root);
114 static int valid_host(cupsd_client_t *con);
115 static int write_file(cupsd_client_t *con, http_status_t code,
116 char *filename, char *type,
117 struct stat *filestats);
118 static void write_pipe(cupsd_client_t *con);
119
120
121 /*
122 * 'cupsdAcceptClient()' - Accept a new client.
123 */
124
125 void
126 cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */
127 {
128 int count; /* Count of connections on a host */
129 int val; /* Parameter value */
130 cupsd_client_t *con, /* New client pointer */
131 *tempcon; /* Temporary client pointer */
132 http_addrlist_t *addrlist, /* List of adddresses for host */
133 *addr; /* Current address */
134 socklen_t addrlen; /* Length of address */
135 char *hostname; /* Hostname for address */
136 http_addr_t temp; /* Temporary address variable */
137 static time_t last_dos = 0; /* Time of last DoS attack */
138 #ifdef HAVE_TCPD_H
139 struct request_info wrap_req; /* TCP wrappers request information */
140 #endif /* HAVE_TCPD_H */
141
142
143 cupsdLogMessage(CUPSD_LOG_DEBUG2,
144 "cupsdAcceptClient(lis=%p(%d)) Clients=%d",
145 lis, lis->fd, cupsArrayCount(Clients));
146
147 /*
148 * Make sure we don't have a full set of clients already...
149 */
150
151 if (cupsArrayCount(Clients) == MaxClients)
152 return;
153
154 /*
155 * Get a pointer to the next available client...
156 */
157
158 if (!Clients)
159 Clients = cupsArrayNew(NULL, NULL);
160
161 if (!Clients)
162 {
163 cupsdLogMessage(CUPSD_LOG_ERROR,
164 "Unable to allocate memory for clients array!");
165 cupsdPauseListening();
166 return;
167 }
168
169 if (!ActiveClients)
170 ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL);
171
172 if (!ActiveClients)
173 {
174 cupsdLogMessage(CUPSD_LOG_ERROR,
175 "Unable to allocate memory for active clients array!");
176 cupsdPauseListening();
177 return;
178 }
179
180 if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL)
181 {
182 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!");
183 cupsdPauseListening();
184 return;
185 }
186
187 con->http.activity = time(NULL);
188 con->file = -1;
189 con->http.hostaddr = &(con->clientaddr);
190
191 /*
192 * Accept the client and get the remote address...
193 */
194
195 addrlen = sizeof(http_addr_t);
196
197 if ((con->http.fd = accept(lis->fd, (struct sockaddr *)con->http.hostaddr,
198 &addrlen)) < 0)
199 {
200 if (errno == ENFILE || errno == EMFILE)
201 cupsdPauseListening();
202
203 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.",
204 strerror(errno));
205 free(con);
206
207 return;
208 }
209
210 #ifdef AF_INET6
211 if (lis->address.addr.sa_family == AF_INET6)
212 {
213 /*
214 * Save the connected port number...
215 */
216
217 con->http.hostaddr->ipv6.sin6_port = lis->address.ipv6.sin6_port;
218
219 /*
220 * Convert IPv4 over IPv6 addresses (::ffff:n.n.n.n) to IPv4 forms we
221 * can more easily use...
222 */
223
224 if (con->http.hostaddr->ipv6.sin6_addr.s6_addr32[0] == 0 &&
225 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[1] == 0 &&
226 ntohl(con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2]) == 0xffff)
227 con->http.hostaddr->ipv6.sin6_addr.s6_addr32[2] = 0;
228 }
229 else
230 #endif /* AF_INET6 */
231 if (lis->address.addr.sa_family == AF_INET)
232 con->http.hostaddr->ipv4.sin_port = lis->address.ipv4.sin_port;
233
234 /*
235 * Check the number of clients on the same address...
236 */
237
238 for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients);
239 tempcon;
240 tempcon = (cupsd_client_t *)cupsArrayNext(Clients))
241 if (httpAddrEqual(tempcon->http.hostaddr, con->http.hostaddr))
242 {
243 count ++;
244 if (count >= MaxClientsPerHost)
245 break;
246 }
247
248 if (count >= MaxClientsPerHost)
249 {
250 if ((time(NULL) - last_dos) >= 60)
251 {
252 last_dos = time(NULL);
253 cupsdLogMessage(CUPSD_LOG_WARN,
254 "Possible DoS attack - more than %d clients connecting "
255 "from %s!",
256 MaxClientsPerHost,
257 httpAddrString(con->http.hostaddr, con->http.hostname,
258 sizeof(con->http.hostname)));
259 }
260
261 #ifdef WIN32
262 closesocket(con->http.fd);
263 #else
264 close(con->http.fd);
265 #endif /* WIN32 */
266
267 free(con);
268 return;
269 }
270
271 /*
272 * Get the hostname or format the IP address as needed...
273 */
274
275 if (httpAddrLocalhost(con->http.hostaddr))
276 {
277 /*
278 * Map accesses from the loopback interface to "localhost"...
279 */
280
281 strlcpy(con->http.hostname, "localhost", sizeof(con->http.hostname));
282 hostname = con->http.hostname;
283 }
284 else
285 {
286 /*
287 * Map accesses from the same host to the server name.
288 */
289
290 if (HostNameLookups)
291 hostname = httpAddrLookup(con->http.hostaddr, con->http.hostname,
292 sizeof(con->http.hostname));
293 else
294 {
295 hostname = NULL;
296 httpAddrString(con->http.hostaddr, con->http.hostname,
297 sizeof(con->http.hostname));
298 }
299 }
300
301 if (hostname == NULL && HostNameLookups == 2)
302 {
303 /*
304 * Can't have an unresolved IP address with double-lookups enabled...
305 */
306
307 #ifdef WIN32
308 closesocket(con->http.fd);
309 #else
310 close(con->http.fd);
311 #endif /* WIN32 */
312
313 cupsdLogMessage(CUPSD_LOG_WARN,
314 "Name lookup failed - connection from %s closed!",
315 con->http.hostname);
316
317 free(con);
318 return;
319 }
320
321 if (HostNameLookups == 2)
322 {
323 /*
324 * Do double lookups as needed...
325 */
326
327 if ((addrlist = httpAddrGetList(con->http.hostname, AF_UNSPEC, NULL))
328 != NULL)
329 {
330 /*
331 * See if the hostname maps to the same IP address...
332 */
333
334 for (addr = addrlist; addr; addr = addr->next)
335 if (httpAddrEqual(con->http.hostaddr, &(addr->addr)))
336 break;
337 }
338 else
339 addr = NULL;
340
341 httpAddrFreeList(addrlist);
342
343 if (!addr)
344 {
345 /*
346 * Can't have a hostname that doesn't resolve to the same IP address
347 * with double-lookups enabled...
348 */
349
350 #ifdef WIN32
351 closesocket(con->http.fd);
352 #else
353 close(con->http.fd);
354 #endif /* WIN32 */
355
356 cupsdLogMessage(CUPSD_LOG_WARN,
357 "IP lookup failed - connection from %s closed!",
358 con->http.hostname);
359 free(con);
360 return;
361 }
362 }
363
364 #ifdef HAVE_TCPD_H
365 /*
366 * See if the connection is denied by TCP wrappers...
367 */
368
369 request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, con->http.fd, NULL);
370 fromhost(&wrap_req);
371
372 if (!hosts_access(&wrap_req))
373 {
374 #ifdef WIN32
375 closesocket(con->http.fd);
376 #else
377 close(con->http.fd);
378 #endif /* WIN32 */
379
380 cupsdLogMessage(CUPSD_LOG_WARN,
381 "Connection from %s refused by /etc/hosts.allow and "
382 "/etc/hosts.deny rules.", con->http.hostname);
383 free(con);
384 return;
385 }
386 #endif /* HAVE_TCPD_H */
387
388 #ifdef AF_INET6
389 if (con->http.hostaddr->addr.sa_family == AF_INET6)
390 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv6)",
391 con->http.fd, con->http.hostname,
392 ntohs(con->http.hostaddr->ipv6.sin6_port));
393 else
394 #endif /* AF_INET6 */
395 #ifdef AF_LOCAL
396 if (con->http.hostaddr->addr.sa_family == AF_LOCAL)
397 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s (Domain)",
398 con->http.fd, con->http.hostname);
399 else
400 #endif /* AF_LOCAL */
401 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdAcceptClient: %d from %s:%d (IPv4)",
402 con->http.fd, con->http.hostname,
403 ntohs(con->http.hostaddr->ipv4.sin_port));
404
405 /*
406 * Get the local address the client connected to...
407 */
408
409 addrlen = sizeof(temp);
410 if (getsockname(con->http.fd, (struct sockaddr *)&temp, &addrlen))
411 {
412 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to get local address - %s",
413 strerror(errno));
414
415 strcpy(con->servername, "localhost");
416 con->serverport = LocalPort;
417 }
418 else
419 {
420 #ifdef AF_INET6
421 if (temp.addr.sa_family == AF_INET6)
422 {
423 if (httpAddrLocalhost(&temp))
424 strlcpy(con->servername, "localhost", sizeof(con->servername));
425 else if (HostNameLookups || RemotePort)
426 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
427 else
428 httpAddrString(&temp, con->servername, sizeof(con->servername));
429
430 con->serverport = ntohs(lis->address.ipv6.sin6_port);
431 }
432 else
433 #endif /* AF_INET6 */
434 if (temp.addr.sa_family == AF_INET)
435 {
436 if (httpAddrLocalhost(&temp))
437 strlcpy(con->servername, "localhost", sizeof(con->servername));
438 else if (HostNameLookups || RemotePort)
439 httpAddrLookup(&temp, con->servername, sizeof(con->servername));
440 else
441 httpAddrString(&temp, con->servername, sizeof(con->servername));
442
443 con->serverport = ntohs(lis->address.ipv4.sin_port);
444 }
445 else
446 {
447 strcpy(con->servername, "localhost");
448 con->serverport = LocalPort;
449 }
450 }
451
452 cupsArrayAdd(Clients, con);
453
454 /*
455 * Using TCP_NODELAY improves responsiveness, especially on systems with a slow
456 * loopback interface. Since we write large buffers when sending print files
457 * and requests there shouldn't be any performance penalty for this...
458 */
459
460 val = 1;
461 setsockopt(con->http.fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
462
463 /*
464 * Close this file on all execs...
465 */
466
467 fcntl(con->http.fd, F_SETFD, fcntl(con->http.fd, F_GETFD) | FD_CLOEXEC);
468
469 /*
470 * Add the socket to the server select.
471 */
472
473 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
474
475 /*
476 * Temporarily suspend accept()'s until we lose a client...
477 */
478
479 if (cupsArrayCount(Clients) == MaxClients)
480 cupsdPauseListening();
481
482 #ifdef HAVE_SSL
483 /*
484 * See if we are connecting on a secure port...
485 */
486
487 if (lis->encryption == HTTP_ENCRYPT_ALWAYS)
488 {
489 /*
490 * https connection; go secure...
491 */
492
493 con->http.encryption = HTTP_ENCRYPT_ALWAYS;
494
495 if (!encrypt_client(con))
496 cupsdCloseClient(con);
497 }
498 else
499 con->auto_ssl = 1;
500 #endif /* HAVE_SSL */
501 }
502
503
504 /*
505 * 'cupsdCloseAllClients()' - Close all remote clients immediately.
506 */
507
508 void
509 cupsdCloseAllClients(void)
510 {
511 cupsd_client_t *con; /* Current client */
512
513
514 cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d",
515 cupsArrayCount(Clients));
516
517 for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
518 con;
519 con = (cupsd_client_t *)cupsArrayNext(Clients))
520 if (cupsdCloseClient(con))
521 cupsdCloseClient(con);
522 }
523
524
525 /*
526 * 'cupsdCloseClient()' - Close a remote client.
527 */
528
529 int /* O - 1 if partial close, 0 if fully closed */
530 cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */
531 {
532 int partial; /* Do partial close for SSL? */
533 #ifdef HAVE_LIBSSL
534 SSL_CTX *context; /* Context for encryption */
535 SSL *conn; /* Connection for encryption */
536 unsigned long error; /* Error code */
537 #elif defined(HAVE_GNUTLS)
538 http_tls_t *conn; /* TLS connection information */
539 int error; /* Error code */
540 gnutls_certificate_server_credentials *credentials;
541 /* TLS credentials */
542 # elif defined(HAVE_CDSASSL)
543 http_tls_t *conn; /* CDSA connection information */
544 #endif /* HAVE_LIBSSL */
545
546
547 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdCloseClient: %d", con->http.fd);
548
549 /*
550 * Flush pending writes before closing...
551 */
552
553 httpFlushWrite(HTTP(con));
554
555 partial = 0;
556
557 #ifdef HAVE_SSL
558 /*
559 * Shutdown encryption as needed...
560 */
561
562 if (con->http.tls)
563 {
564 partial = 1;
565
566 # ifdef HAVE_LIBSSL
567 conn = (SSL *)(con->http.tls);
568 context = SSL_get_SSL_CTX(conn);
569
570 switch (SSL_shutdown(conn))
571 {
572 case 1 :
573 cupsdLogMessage(CUPSD_LOG_DEBUG,
574 "SSL shutdown successful!");
575 break;
576 case -1 :
577 cupsdLogMessage(CUPSD_LOG_ERROR,
578 "Fatal error during SSL shutdown!");
579 default :
580 while ((error = ERR_get_error()) != 0)
581 cupsdLogMessage(CUPSD_LOG_ERROR, "SSL shutdown failed: %s",
582 ERR_error_string(error, NULL));
583 break;
584 }
585
586 SSL_CTX_free(context);
587 SSL_free(conn);
588
589 # elif defined(HAVE_GNUTLS)
590 conn = (http_tls_t *)(con->http.tls);
591 credentials = (gnutls_certificate_server_credentials *)(conn->credentials);
592
593 error = gnutls_bye(conn->session, GNUTLS_SHUT_WR);
594 switch (error)
595 {
596 case GNUTLS_E_SUCCESS:
597 cupsdLogMessage(CUPSD_LOG_DEBUG,
598 "SSL shutdown successful!");
599 break;
600 default:
601 cupsdLogMessage(CUPSD_LOG_ERROR,
602 "SSL shutdown failed: %s", gnutls_strerror(error));
603 break;
604 }
605
606 gnutls_deinit(conn->session);
607 gnutls_certificate_free_credentials(*credentials);
608 free(credentials);
609 free(conn);
610
611 # elif defined(HAVE_CDSASSL)
612 conn = (http_tls_t *)(con->http.tls);
613
614 while (SSLClose(conn->session) == errSSLWouldBlock)
615 usleep(1000);
616
617 SSLDisposeContext(conn->session);
618
619 if (conn->certsArray)
620 CFRelease(conn->certsArray);
621
622 free(conn);
623 # endif /* HAVE_LIBSSL */
624
625 con->http.tls = NULL;
626 }
627 #endif /* HAVE_SSL */
628
629 if (con->pipe_pid != 0)
630 {
631 /*
632 * Stop any CGI process...
633 */
634
635 cupsdEndProcess(con->pipe_pid, 1);
636 con->pipe_pid = 0;
637 }
638
639 if (con->file >= 0)
640 {
641 cupsdRemoveSelect(con->file);
642
643 close(con->file);
644 con->file = -1;
645 }
646
647 /*
648 * Close the socket and clear the file from the input set for select()...
649 */
650
651 if (con->http.fd >= 0)
652 {
653 cupsArrayRemove(ActiveClients, con);
654 cupsdSetBusyState();
655
656 if (partial)
657 {
658 /*
659 * Only do a partial close so that the encrypted client gets everything.
660 */
661
662 shutdown(con->http.fd, 0);
663 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
664 }
665 else
666 {
667 /*
668 * Shut the socket down fully...
669 */
670
671 cupsdRemoveSelect(con->http.fd);
672 close(con->http.fd);
673 con->http.fd = -1;
674 }
675 }
676
677 if (!partial)
678 {
679 /*
680 * Free memory...
681 */
682
683 if (con->http.input_set)
684 free(con->http.input_set);
685
686 httpClearCookie(HTTP(con));
687 httpClearFields(HTTP(con));
688
689 cupsdClearString(&con->filename);
690 cupsdClearString(&con->command);
691 cupsdClearString(&con->options);
692 cupsdClearString(&con->query_string);
693
694 if (con->request)
695 {
696 ippDelete(con->request);
697 con->request = NULL;
698 }
699
700 if (con->response)
701 {
702 ippDelete(con->response);
703 con->response = NULL;
704 }
705
706 if (con->language)
707 {
708 cupsLangFree(con->language);
709 con->language = NULL;
710 }
711
712 #ifdef HAVE_AUTHORIZATION_H
713 if (con->authref)
714 {
715 AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
716 con->authref = NULL;
717 }
718 #endif /* HAVE_AUTHORIZATION_H */
719
720 /*
721 * Re-enable new client connections if we are going back under the
722 * limit...
723 */
724
725 if (cupsArrayCount(Clients) == MaxClients)
726 cupsdResumeListening();
727
728 /*
729 * Compact the list of clients as necessary...
730 */
731
732 cupsArrayRemove(Clients, con);
733
734 free(con);
735 }
736
737 return (partial);
738 }
739
740
741 /*
742 * 'cupsdFlushHeader()' - Flush the header fields to the client.
743 */
744
745 int /* I - Bytes written or -1 on error */
746 cupsdFlushHeader(cupsd_client_t *con) /* I - Client to flush to */
747 {
748 int bytes = httpFlushWrite(HTTP(con));
749
750 con->http.data_encoding = HTTP_ENCODE_LENGTH;
751
752 return (bytes);
753 }
754
755
756 /*
757 * 'cupsdReadClient()' - Read data from a client.
758 */
759
760 void
761 cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */
762 {
763 char line[32768], /* Line from client... */
764 operation[64], /* Operation code from socket */
765 version[64], /* HTTP version number string */
766 locale[64], /* Locale */
767 *ptr; /* Pointer into strings */
768 int major, minor; /* HTTP version numbers */
769 http_status_t status; /* Transfer status */
770 ipp_state_t ipp_state; /* State of IPP transfer */
771 int bytes; /* Number of bytes to POST */
772 char *filename; /* Name of file for GET/HEAD */
773 char buf[1024]; /* Buffer for real filename */
774 struct stat filestats; /* File information */
775 mime_type_t *type; /* MIME type of file */
776 cupsd_printer_t *p; /* Printer */
777 static unsigned request_id = 0; /* Request ID for temp files */
778
779
780 status = HTTP_CONTINUE;
781
782 cupsdLogMessage(CUPSD_LOG_DEBUG2,
783 "cupsdReadClient(con=%p(%d)) "
784 "con->http.error=%d "
785 "con->http.used=%d, "
786 "con->http.state=%d "
787 "con->data_encoding=HTTP_ENCODE_%s, "
788 "con->data_remaining=" CUPS_LLFMT ", "
789 "con->file=%d",
790 con, con->http.fd, con->http.error, con->http.used,
791 con->http.state,
792 con->http.data_encoding == HTTP_ENCODE_CHUNKED ?
793 "CHUNKED" : "LENGTH",
794 CUPS_LLCAST con->http.data_remaining, con->file);
795
796 #ifdef HAVE_SSL
797 if (con->auto_ssl)
798 {
799 /*
800 * Automatically check for a SSL/TLS handshake...
801 */
802
803 con->auto_ssl = 0;
804
805 if (recv(con->http.fd, buf, 1, MSG_PEEK) == 1 &&
806 (!buf[0] || !strchr("DGHOPT", buf[0])))
807 {
808 /*
809 * Encrypt this connection...
810 */
811
812 cupsdLogMessage(CUPSD_LOG_DEBUG2,
813 "cupsdReadClient: Saw first byte %02X, auto-negotiating "
814 "SSL/TLS session...", buf[0] & 255);
815
816 if (!encrypt_client(con))
817 cupsdCloseClient(con);
818
819 return;
820 }
821 }
822 #endif /* HAVE_SSL */
823
824 switch (con->http.state)
825 {
826 case HTTP_WAITING :
827 /*
828 * See if we've received a request line...
829 */
830
831 if (httpGets(line, sizeof(line) - 1, HTTP(con)) == NULL)
832 {
833 if (con->http.error && con->http.error != EPIPE)
834 cupsdLogMessage(CUPSD_LOG_DEBUG,
835 "cupsdReadClient: %d WAITING Closing for error %d "
836 "(%s)", con->http.fd, con->http.error,
837 strerror(con->http.error));
838 else
839 cupsdLogMessage(CUPSD_LOG_DEBUG,
840 "cupsdReadClient: %d WAITING Closing on EOF",
841 con->http.fd);
842
843 cupsdCloseClient(con);
844 return;
845 }
846
847 /*
848 * Ignore blank request lines...
849 */
850
851 if (line[0] == '\0')
852 break;
853
854 /*
855 * Clear other state variables...
856 */
857
858 httpClearFields(HTTP(con));
859
860 con->http.activity = time(NULL);
861 con->http.version = HTTP_1_0;
862 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
863 con->http.data_encoding = HTTP_ENCODE_LENGTH;
864 con->http.data_remaining = 0;
865 con->http._data_remaining = 0;
866 con->operation = HTTP_WAITING;
867 con->bytes = 0;
868 con->file = -1;
869 con->file_ready = 0;
870 con->pipe_pid = 0;
871 con->username[0] = '\0';
872 con->password[0] = '\0';
873 con->uri[0] = '\0';
874
875 cupsdClearString(&con->command);
876 cupsdClearString(&con->options);
877 cupsdClearString(&con->query_string);
878
879 if (con->request)
880 {
881 ippDelete(con->request);
882 con->request = NULL;
883 }
884
885 if (con->response)
886 {
887 ippDelete(con->response);
888 con->response = NULL;
889 }
890
891 if (con->language)
892 {
893 cupsLangFree(con->language);
894 con->language = NULL;
895 }
896
897 #ifdef HAVE_GSSAPI
898 con->have_gss = 0;
899
900 if (con->gss_creds)
901 {
902 OM_uint32 minor_status;
903 gss_release_cred(&minor_status, &con->gss_creds);
904 }
905 #endif /* HAVE_GSSAPI */
906
907 /*
908 * Grab the request line...
909 */
910
911 switch (sscanf(line, "%63s%1023s%63s", operation, con->uri, version))
912 {
913 case 1 :
914 if (line[0])
915 {
916 cupsdLogMessage(CUPSD_LOG_ERROR,
917 "Bad request line \"%s\" from %s!", line,
918 con->http.hostname);
919 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
920 cupsdCloseClient(con);
921 }
922 return;
923 case 2 :
924 con->http.version = HTTP_0_9;
925 break;
926 case 3 :
927 if (sscanf(version, "HTTP/%d.%d", &major, &minor) != 2)
928 {
929 cupsdLogMessage(CUPSD_LOG_ERROR,
930 "Bad request line \"%s\" from %s!", line,
931 con->http.hostname);
932 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
933 cupsdCloseClient(con);
934 return;
935 }
936
937 if (major < 2)
938 {
939 con->http.version = (http_version_t)(major * 100 + minor);
940 if (con->http.version == HTTP_1_1 && KeepAlive)
941 con->http.keep_alive = HTTP_KEEPALIVE_ON;
942 else
943 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
944 }
945 else
946 {
947 cupsdLogMessage(CUPSD_LOG_ERROR,
948 "Unsupported request line \"%s\" from %s!",
949 line, con->http.hostname);
950 cupsdSendError(con, HTTP_NOT_SUPPORTED, CUPSD_AUTH_NONE);
951 cupsdCloseClient(con);
952 return;
953 }
954 break;
955 }
956
957 /*
958 * Handle full URLs in the request line...
959 */
960
961 if (strcmp(con->uri, "*"))
962 {
963 char scheme[HTTP_MAX_URI], /* Method/scheme */
964 userpass[HTTP_MAX_URI], /* Username:password */
965 hostname[HTTP_MAX_URI], /* Hostname */
966 resource[HTTP_MAX_URI]; /* Resource path */
967 int port; /* Port number */
968
969
970 /*
971 * Separate the URI into its components...
972 */
973
974 httpSeparateURI(HTTP_URI_CODING_MOST, con->uri,
975 scheme, sizeof(scheme),
976 userpass, sizeof(userpass),
977 hostname, sizeof(hostname), &port,
978 resource, sizeof(resource));
979
980 /*
981 * Only allow URIs with the servername, localhost, or an IP
982 * address...
983 */
984
985 if (strcmp(scheme, "file") &&
986 strcasecmp(hostname, ServerName) &&
987 strcasecmp(hostname, "localhost") &&
988 !isdigit(hostname[0]) && hostname[0] != '[')
989 {
990 /*
991 * Nope, we don't do proxies...
992 */
993
994 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad URI \"%s\" in request!",
995 con->uri);
996 cupsdSendError(con, HTTP_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE);
997 cupsdCloseClient(con);
998 return;
999 }
1000
1001 /*
1002 * Copy the resource portion back into the URI; both resource and
1003 * con->uri are HTTP_MAX_URI bytes in size...
1004 */
1005
1006 strcpy(con->uri, resource);
1007 }
1008
1009 /*
1010 * Process the request...
1011 */
1012
1013 if (!strcmp(operation, "GET"))
1014 con->http.state = HTTP_GET;
1015 else if (!strcmp(operation, "PUT"))
1016 con->http.state = HTTP_PUT;
1017 else if (!strcmp(operation, "POST"))
1018 con->http.state = HTTP_POST;
1019 else if (!strcmp(operation, "DELETE"))
1020 con->http.state = HTTP_DELETE;
1021 else if (!strcmp(operation, "TRACE"))
1022 con->http.state = HTTP_TRACE;
1023 else if (!strcmp(operation, "OPTIONS"))
1024 con->http.state = HTTP_OPTIONS;
1025 else if (!strcmp(operation, "HEAD"))
1026 con->http.state = HTTP_HEAD;
1027 else
1028 {
1029 cupsdLogMessage(CUPSD_LOG_ERROR, "Bad operation \"%s\"!", operation);
1030 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1031 cupsdCloseClient(con);
1032 return;
1033 }
1034
1035 gettimeofday(&(con->start), NULL);
1036 con->operation = con->http.state;
1037
1038 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %s %s HTTP/%d.%d",
1039 con->http.fd, operation, con->uri,
1040 con->http.version / 100, con->http.version % 100);
1041
1042 con->http.status = HTTP_OK;
1043
1044 if (!cupsArrayFind(ActiveClients, con))
1045 {
1046 cupsArrayAdd(ActiveClients, con);
1047 cupsdSetBusyState();
1048 }
1049
1050 case HTTP_OPTIONS :
1051 case HTTP_DELETE :
1052 case HTTP_GET :
1053 case HTTP_HEAD :
1054 case HTTP_POST :
1055 case HTTP_PUT :
1056 case HTTP_TRACE :
1057 /*
1058 * Parse incoming parameters until the status changes...
1059 */
1060
1061 while ((status = httpUpdate(HTTP(con))) == HTTP_CONTINUE)
1062 if (!data_ready(con))
1063 break;
1064
1065 if (status != HTTP_OK && status != HTTP_CONTINUE)
1066 {
1067 if (con->http.error && con->http.error != EPIPE)
1068 cupsdLogMessage(CUPSD_LOG_DEBUG,
1069 "cupsdReadClient: %d FIELDS Closing for error %d "
1070 "(%s)", con->http.fd, con->http.error,
1071 strerror(con->http.error));
1072 else
1073 cupsdLogMessage(CUPSD_LOG_DEBUG,
1074 "cupsdReadClient: %d FIELDS Closing on EOF",
1075 con->http.fd);
1076
1077 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
1078 cupsdCloseClient(con);
1079 return;
1080 }
1081 break;
1082
1083 default :
1084 if (!data_ready(con) && recv(con->http.fd, buf, 1, MSG_PEEK) < 1)
1085 {
1086 /*
1087 * Connection closed...
1088 */
1089
1090 cupsdLogMessage(CUPSD_LOG_DEBUG,
1091 "cupsdReadClient: %d Closing on EOF", con->http.fd);
1092 cupsdCloseClient(con);
1093 return;
1094 }
1095 break; /* Anti-compiler-warning-code */
1096 }
1097
1098 /*
1099 * Handle new transfers...
1100 */
1101
1102 if (status == HTTP_OK)
1103 {
1104 if (con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE][0])
1105 {
1106 /*
1107 * Figure out the locale from the Accept-Language and Content-Type
1108 * fields...
1109 */
1110
1111 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1112 ',')) != NULL)
1113 *ptr = '\0';
1114
1115 if ((ptr = strchr(con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE],
1116 ';')) != NULL)
1117 *ptr = '\0';
1118
1119 if ((ptr = strstr(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1120 "charset=")) != NULL)
1121 {
1122 /*
1123 * Combine language and charset, and trim any extra params in the
1124 * content-type.
1125 */
1126
1127 snprintf(locale, sizeof(locale), "%s.%s",
1128 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE], ptr + 8);
1129
1130 if ((ptr = strchr(locale, ',')) != NULL)
1131 *ptr = '\0';
1132 }
1133 else
1134 snprintf(locale, sizeof(locale), "%s.UTF-8",
1135 con->http.fields[HTTP_FIELD_ACCEPT_LANGUAGE]);
1136
1137 con->language = cupsLangGet(locale);
1138 }
1139 else
1140 con->language = cupsLangGet(DefaultLocale);
1141
1142 cupsdAuthorize(con);
1143
1144 if (!strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Keep-Alive",
1145 10) && KeepAlive)
1146 con->http.keep_alive = HTTP_KEEPALIVE_ON;
1147 else if (!strncasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "close", 5))
1148 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1149
1150 if (!con->http.fields[HTTP_FIELD_HOST][0] &&
1151 con->http.version >= HTTP_1_1)
1152 {
1153 /*
1154 * HTTP/1.1 and higher require the "Host:" field...
1155 */
1156
1157 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1158 {
1159 cupsdLogMessage(CUPSD_LOG_ERROR, "Missing Host: field in request!");
1160 cupsdCloseClient(con);
1161 return;
1162 }
1163 }
1164 else if (!valid_host(con))
1165 {
1166 /*
1167 * Access to localhost must use "localhost" or the corresponding IPv4
1168 * or IPv6 values in the Host: field.
1169 */
1170
1171 cupsdLogMessage(CUPSD_LOG_ERROR,
1172 "Request from \"%s\" using invalid Host: field \"%s\"",
1173 con->http.hostname, con->http.fields[HTTP_FIELD_HOST]);
1174
1175 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1176 {
1177 cupsdCloseClient(con);
1178 return;
1179 }
1180 }
1181 else if (con->operation == HTTP_OPTIONS)
1182 {
1183 /*
1184 * Do OPTIONS command...
1185 */
1186
1187 if (con->best && con->best->type != CUPSD_AUTH_NONE)
1188 {
1189 if (!cupsdSendHeader(con, HTTP_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE))
1190 {
1191 cupsdCloseClient(con);
1192 return;
1193 }
1194 }
1195
1196 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1197 con->http.tls == NULL)
1198 {
1199 #ifdef HAVE_SSL
1200 /*
1201 * Do encryption stuff...
1202 */
1203
1204 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1205 {
1206 cupsdCloseClient(con);
1207 return;
1208 }
1209
1210 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1211 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1212 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1213 httpPrintf(HTTP(con), "\r\n");
1214
1215 if (cupsdFlushHeader(con) < 0)
1216 {
1217 cupsdCloseClient(con);
1218 return;
1219 }
1220
1221 if (!encrypt_client(con))
1222 {
1223 cupsdCloseClient(con);
1224 return;
1225 }
1226 #else
1227 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1228 {
1229 cupsdCloseClient(con);
1230 return;
1231 }
1232 #endif /* HAVE_SSL */
1233 }
1234
1235 if (!cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE))
1236 {
1237 cupsdCloseClient(con);
1238 return;
1239 }
1240
1241 httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n");
1242 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1243 httpPrintf(HTTP(con), "\r\n");
1244
1245 if (cupsdFlushHeader(con) < 0)
1246 {
1247 cupsdCloseClient(con);
1248 return;
1249 }
1250 }
1251 else if (!is_path_absolute(con->uri))
1252 {
1253 /*
1254 * Protect against malicious users!
1255 */
1256
1257 cupsdLogMessage(CUPSD_LOG_ERROR,
1258 "Request for non-absolute resource \"%s\"!", con->uri);
1259
1260 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1261 {
1262 cupsdCloseClient(con);
1263 return;
1264 }
1265 }
1266 else
1267 {
1268 if (!strcasecmp(con->http.fields[HTTP_FIELD_CONNECTION], "Upgrade") &&
1269 con->http.tls == NULL)
1270 {
1271 #ifdef HAVE_SSL
1272 /*
1273 * Do encryption stuff...
1274 */
1275
1276 if (!cupsdSendHeader(con, HTTP_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE))
1277 {
1278 cupsdCloseClient(con);
1279 return;
1280 }
1281
1282 httpPrintf(HTTP(con), "Connection: Upgrade\r\n");
1283 httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n");
1284 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1285 httpPrintf(HTTP(con), "\r\n");
1286
1287 if (cupsdFlushHeader(con) < 0)
1288 {
1289 cupsdCloseClient(con);
1290 return;
1291 }
1292
1293 if (!encrypt_client(con))
1294 {
1295 cupsdCloseClient(con);
1296 return;
1297 }
1298 #else
1299 if (!cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE))
1300 {
1301 cupsdCloseClient(con);
1302 return;
1303 }
1304 #endif /* HAVE_SSL */
1305 }
1306
1307 if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_OK)
1308 {
1309 cupsdSendError(con, status, CUPSD_AUTH_NONE);
1310 cupsdCloseClient(con);
1311 return;
1312 }
1313
1314 if (con->http.expect &&
1315 (con->operation == HTTP_POST || con->operation == HTTP_PUT))
1316 {
1317 if (con->http.expect == HTTP_CONTINUE)
1318 {
1319 /*
1320 * Send 100-continue header...
1321 */
1322
1323 if (!cupsdSendHeader(con, HTTP_CONTINUE, NULL, CUPSD_AUTH_NONE))
1324 {
1325 cupsdCloseClient(con);
1326 return;
1327 }
1328 }
1329 else
1330 {
1331 /*
1332 * Send 417-expectation-failed header...
1333 */
1334
1335 if (!cupsdSendHeader(con, HTTP_EXPECTATION_FAILED, NULL,
1336 CUPSD_AUTH_NONE))
1337 {
1338 cupsdCloseClient(con);
1339 return;
1340 }
1341
1342 httpPrintf(HTTP(con), "Content-Length: 0\r\n");
1343 httpPrintf(HTTP(con), "\r\n");
1344
1345 if (cupsdFlushHeader(con) < 0)
1346 {
1347 cupsdCloseClient(con);
1348 return;
1349 }
1350 }
1351 }
1352
1353 switch (con->http.state)
1354 {
1355 case HTTP_GET_SEND :
1356 if (!strncmp(con->uri, "/printers/", 10) &&
1357 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1358 {
1359 /*
1360 * Send PPD file - get the real printer name since printer
1361 * names are not case sensitive but filenames can be...
1362 */
1363
1364 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1365
1366 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1367 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1368 else
1369 {
1370 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1371 {
1372 cupsdCloseClient(con);
1373 return;
1374 }
1375
1376 break;
1377 }
1378 }
1379
1380 if ((!strncmp(con->uri, "/admin", 6) &&
1381 strncmp(con->uri, "/admin/conf/", 12) &&
1382 strncmp(con->uri, "/admin/log/", 11)) ||
1383 !strncmp(con->uri, "/printers", 9) ||
1384 !strncmp(con->uri, "/classes", 8) ||
1385 !strncmp(con->uri, "/help", 5) ||
1386 !strncmp(con->uri, "/jobs", 5))
1387 {
1388 /*
1389 * Send CGI output...
1390 */
1391
1392 if (!strncmp(con->uri, "/admin", 6))
1393 {
1394 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1395 ServerBin);
1396
1397 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1398 }
1399 else if (!strncmp(con->uri, "/printers", 9))
1400 {
1401 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1402 ServerBin);
1403
1404 if (con->uri[9] && con->uri[10])
1405 cupsdSetString(&con->options, con->uri + 9);
1406 else
1407 cupsdSetString(&con->options, NULL);
1408 }
1409 else if (!strncmp(con->uri, "/classes", 8))
1410 {
1411 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1412 ServerBin);
1413
1414 if (con->uri[8] && con->uri[9])
1415 cupsdSetString(&con->options, con->uri + 8);
1416 else
1417 cupsdSetString(&con->options, NULL);
1418 }
1419 else if (!strncmp(con->uri, "/jobs", 5))
1420 {
1421 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1422 ServerBin);
1423
1424 if (con->uri[5] && con->uri[6])
1425 cupsdSetString(&con->options, con->uri + 5);
1426 else
1427 cupsdSetString(&con->options, NULL);
1428 }
1429 else
1430 {
1431 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1432 ServerBin);
1433
1434 if (con->uri[5] && con->uri[6])
1435 cupsdSetString(&con->options, con->uri + 5);
1436 else
1437 cupsdSetString(&con->options, NULL);
1438 }
1439
1440 if (!cupsdSendCommand(con, con->command, con->options, 0))
1441 {
1442 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1443 {
1444 cupsdCloseClient(con);
1445 return;
1446 }
1447 }
1448 else
1449 cupsdLogRequest(con, HTTP_OK);
1450
1451 if (con->http.version <= HTTP_1_0)
1452 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1453 }
1454 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1455 (strchr(con->uri + 12, '/') ||
1456 strlen(con->uri) == 12)) ||
1457 (!strncmp(con->uri, "/admin/log/", 11) &&
1458 (strchr(con->uri + 11, '/') ||
1459 strlen(con->uri) == 11)))
1460 {
1461 /*
1462 * GET can only be done to configuration files directly under
1463 * /admin/conf...
1464 */
1465
1466 cupsdLogMessage(CUPSD_LOG_ERROR,
1467 "Request for subdirectory \"%s\"!", con->uri);
1468
1469 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1470 {
1471 cupsdCloseClient(con);
1472 return;
1473 }
1474
1475 break;
1476 }
1477 else
1478 {
1479 /*
1480 * Serve a file...
1481 */
1482
1483 if ((filename = get_file(con, &filestats, buf,
1484 sizeof(buf))) == NULL)
1485 {
1486 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1487 {
1488 cupsdCloseClient(con);
1489 return;
1490 }
1491
1492 break;
1493 }
1494
1495 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1496
1497 if (is_cgi(con, filename, &filestats, type))
1498 {
1499 /*
1500 * Note: con->command and con->options were set by
1501 * is_cgi()...
1502 */
1503
1504 if (!cupsdSendCommand(con, con->command, con->options, 0))
1505 {
1506 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1507 {
1508 cupsdCloseClient(con);
1509 return;
1510 }
1511 }
1512 else
1513 cupsdLogRequest(con, HTTP_OK);
1514
1515 if (con->http.version <= HTTP_1_0)
1516 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1517 break;
1518 }
1519
1520 if (!check_if_modified(con, &filestats))
1521 {
1522 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1523 {
1524 cupsdCloseClient(con);
1525 return;
1526 }
1527 }
1528 else
1529 {
1530 if (type == NULL)
1531 strcpy(line, "text/plain");
1532 else
1533 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1534
1535 if (!write_file(con, HTTP_OK, filename, line, &filestats))
1536 {
1537 cupsdCloseClient(con);
1538 return;
1539 }
1540 }
1541 }
1542 break;
1543
1544 case HTTP_POST_RECV :
1545 /*
1546 * See if the POST request includes a Content-Length field, and if
1547 * so check the length against any limits that are set...
1548 */
1549
1550 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1551 MaxRequestSize > 0 &&
1552 con->http.data_remaining > MaxRequestSize)
1553 {
1554 /*
1555 * Request too large...
1556 */
1557
1558 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1559 {
1560 cupsdCloseClient(con);
1561 return;
1562 }
1563
1564 break;
1565 }
1566 else if (con->http.data_remaining < 0 ||
1567 (!con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1568 con->http.data_encoding == HTTP_ENCODE_LENGTH))
1569 {
1570 /*
1571 * Negative content lengths are invalid!
1572 */
1573
1574 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1575 {
1576 cupsdCloseClient(con);
1577 return;
1578 }
1579
1580 break;
1581 }
1582
1583 /*
1584 * See what kind of POST request this is; for IPP requests the
1585 * content-type field will be "application/ipp"...
1586 */
1587
1588 if (!strcmp(con->http.fields[HTTP_FIELD_CONTENT_TYPE],
1589 "application/ipp"))
1590 con->request = ippNew();
1591 else if ((!strncmp(con->uri, "/admin", 6) &&
1592 strncmp(con->uri, "/admin/conf/", 12) &&
1593 strncmp(con->uri, "/admin/log/", 11)) ||
1594 !strncmp(con->uri, "/printers", 9) ||
1595 !strncmp(con->uri, "/classes", 8) ||
1596 !strncmp(con->uri, "/help", 5) ||
1597 !strncmp(con->uri, "/jobs", 5))
1598 {
1599 /*
1600 * CGI request...
1601 */
1602
1603 if (!strncmp(con->uri, "/admin", 6))
1604 {
1605 cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi",
1606 ServerBin);
1607
1608 cupsdSetString(&con->options, strchr(con->uri + 6, '?'));
1609 }
1610 else if (!strncmp(con->uri, "/printers", 9))
1611 {
1612 cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi",
1613 ServerBin);
1614
1615 if (con->uri[9] && con->uri[10])
1616 cupsdSetString(&con->options, con->uri + 9);
1617 else
1618 cupsdSetString(&con->options, NULL);
1619 }
1620 else if (!strncmp(con->uri, "/classes", 8))
1621 {
1622 cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi",
1623 ServerBin);
1624
1625 if (con->uri[8] && con->uri[9])
1626 cupsdSetString(&con->options, con->uri + 8);
1627 else
1628 cupsdSetString(&con->options, NULL);
1629 }
1630 else if (!strncmp(con->uri, "/jobs", 5))
1631 {
1632 cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi",
1633 ServerBin);
1634
1635 if (con->uri[5] && con->uri[6])
1636 cupsdSetString(&con->options, con->uri + 5);
1637 else
1638 cupsdSetString(&con->options, NULL);
1639 }
1640 else
1641 {
1642 cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi",
1643 ServerBin);
1644
1645 if (con->uri[5] && con->uri[6])
1646 cupsdSetString(&con->options, con->uri + 5);
1647 else
1648 cupsdSetString(&con->options, NULL);
1649 }
1650
1651 if (con->http.version <= HTTP_1_0)
1652 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
1653 }
1654 else
1655 {
1656 /*
1657 * POST to a file...
1658 */
1659
1660 if ((filename = get_file(con, &filestats, buf,
1661 sizeof(buf))) == NULL)
1662 {
1663 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1664 {
1665 cupsdCloseClient(con);
1666 return;
1667 }
1668
1669 break;
1670 }
1671
1672 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1673
1674 if (!is_cgi(con, filename, &filestats, type))
1675 {
1676 /*
1677 * Only POST to CGI's...
1678 */
1679
1680 if (!cupsdSendError(con, HTTP_UNAUTHORIZED, CUPSD_AUTH_NONE))
1681 {
1682 cupsdCloseClient(con);
1683 return;
1684 }
1685 }
1686 }
1687 break;
1688
1689 case HTTP_PUT_RECV :
1690 /*
1691 * Validate the resource name...
1692 */
1693
1694 if (strncmp(con->uri, "/admin/conf/", 12) ||
1695 strchr(con->uri + 12, '/') ||
1696 strlen(con->uri) == 12)
1697 {
1698 /*
1699 * PUT can only be done to configuration files under
1700 * /admin/conf...
1701 */
1702
1703 cupsdLogMessage(CUPSD_LOG_ERROR,
1704 "Request for subdirectory \"%s\"!", con->uri);
1705
1706 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1707 {
1708 cupsdCloseClient(con);
1709 return;
1710 }
1711
1712 break;
1713 }
1714
1715 /*
1716 * See if the PUT request includes a Content-Length field, and if
1717 * so check the length against any limits that are set...
1718 */
1719
1720 if (con->http.fields[HTTP_FIELD_CONTENT_LENGTH][0] &&
1721 MaxRequestSize > 0 &&
1722 con->http.data_remaining > MaxRequestSize)
1723 {
1724 /*
1725 * Request too large...
1726 */
1727
1728 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1729 {
1730 cupsdCloseClient(con);
1731 return;
1732 }
1733
1734 break;
1735 }
1736 else if (con->http.data_remaining < 0)
1737 {
1738 /*
1739 * Negative content lengths are invalid!
1740 */
1741
1742 if (!cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE))
1743 {
1744 cupsdCloseClient(con);
1745 return;
1746 }
1747
1748 break;
1749 }
1750
1751 /*
1752 * Open a temporary file to hold the request...
1753 */
1754
1755 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
1756 request_id ++);
1757 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
1758
1759 if (con->file < 0)
1760 {
1761 cupsdLogMessage(CUPSD_LOG_ERROR,
1762 "Unable to create request file %s: %s",
1763 con->filename, strerror(errno));
1764
1765 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1766 {
1767 cupsdCloseClient(con);
1768 return;
1769 }
1770 }
1771
1772 fchmod(con->file, 0640);
1773 fchown(con->file, RunUser, Group);
1774 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
1775 break;
1776
1777 case HTTP_DELETE :
1778 case HTTP_TRACE :
1779 cupsdSendError(con, HTTP_NOT_IMPLEMENTED, CUPSD_AUTH_NONE);
1780 cupsdCloseClient(con);
1781 return;
1782
1783 case HTTP_HEAD :
1784 if (!strncmp(con->uri, "/printers/", 10) &&
1785 !strcmp(con->uri + strlen(con->uri) - 4, ".ppd"))
1786 {
1787 /*
1788 * Send PPD file - get the real printer name since printer
1789 * names are not case sensitive but filenames can be...
1790 */
1791
1792 con->uri[strlen(con->uri) - 4] = '\0'; /* Drop ".ppd" */
1793
1794 if ((p = cupsdFindPrinter(con->uri + 10)) != NULL)
1795 snprintf(con->uri, sizeof(con->uri), "/ppd/%s.ppd", p->name);
1796 else
1797 {
1798 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
1799 {
1800 cupsdCloseClient(con);
1801 return;
1802 }
1803
1804 break;
1805 }
1806 }
1807
1808 if ((!strncmp(con->uri, "/admin", 6) &&
1809 strncmp(con->uri, "/admin/conf/", 12) &&
1810 strncmp(con->uri, "/admin/log/", 11)) ||
1811 !strncmp(con->uri, "/printers", 9) ||
1812 !strncmp(con->uri, "/classes", 8) ||
1813 !strncmp(con->uri, "/help", 5) ||
1814 !strncmp(con->uri, "/jobs", 5))
1815 {
1816 /*
1817 * CGI output...
1818 */
1819
1820 if (!cupsdSendHeader(con, HTTP_OK, "text/html", CUPSD_AUTH_NONE))
1821 {
1822 cupsdCloseClient(con);
1823 return;
1824 }
1825
1826 if (httpPrintf(HTTP(con), "\r\n") < 0)
1827 {
1828 cupsdCloseClient(con);
1829 return;
1830 }
1831
1832 if (cupsdFlushHeader(con) < 0)
1833 {
1834 cupsdCloseClient(con);
1835 return;
1836 }
1837
1838 cupsdLogRequest(con, HTTP_OK);
1839 }
1840 else if ((!strncmp(con->uri, "/admin/conf/", 12) &&
1841 (strchr(con->uri + 12, '/') ||
1842 strlen(con->uri) == 12)) ||
1843 (!strncmp(con->uri, "/admin/log/", 11) &&
1844 (strchr(con->uri + 11, '/') ||
1845 strlen(con->uri) == 11)))
1846 {
1847 /*
1848 * HEAD can only be done to configuration files under
1849 * /admin/conf...
1850 */
1851
1852 cupsdLogMessage(CUPSD_LOG_ERROR,
1853 "Request for subdirectory \"%s\"!", con->uri);
1854
1855 if (!cupsdSendError(con, HTTP_FORBIDDEN, CUPSD_AUTH_NONE))
1856 {
1857 cupsdCloseClient(con);
1858 return;
1859 }
1860
1861 break;
1862 }
1863 else if ((filename = get_file(con, &filestats, buf,
1864 sizeof(buf))) == NULL)
1865 {
1866 if (!cupsdSendHeader(con, HTTP_NOT_FOUND, "text/html",
1867 CUPSD_AUTH_NONE))
1868 {
1869 cupsdCloseClient(con);
1870 return;
1871 }
1872
1873 cupsdLogRequest(con, HTTP_NOT_FOUND);
1874 }
1875 else if (!check_if_modified(con, &filestats))
1876 {
1877 if (!cupsdSendError(con, HTTP_NOT_MODIFIED, CUPSD_AUTH_NONE))
1878 {
1879 cupsdCloseClient(con);
1880 return;
1881 }
1882
1883 cupsdLogRequest(con, HTTP_NOT_MODIFIED);
1884 }
1885 else
1886 {
1887 /*
1888 * Serve a file...
1889 */
1890
1891 type = mimeFileType(MimeDatabase, filename, NULL, NULL);
1892 if (type == NULL)
1893 strcpy(line, "text/plain");
1894 else
1895 snprintf(line, sizeof(line), "%s/%s", type->super, type->type);
1896
1897 if (!cupsdSendHeader(con, HTTP_OK, line, CUPSD_AUTH_NONE))
1898 {
1899 cupsdCloseClient(con);
1900 return;
1901 }
1902
1903 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
1904 httpGetDateString(filestats.st_mtime)) < 0)
1905 {
1906 cupsdCloseClient(con);
1907 return;
1908 }
1909
1910 if (httpPrintf(HTTP(con), "Content-Length: %lu\r\n",
1911 (unsigned long)filestats.st_size) < 0)
1912 {
1913 cupsdCloseClient(con);
1914 return;
1915 }
1916
1917 cupsdLogRequest(con, HTTP_OK);
1918 }
1919
1920 if (httpPrintf(HTTP(con), "\r\n") < 0)
1921 {
1922 cupsdCloseClient(con);
1923 return;
1924 }
1925
1926 if (cupsdFlushHeader(con) < 0)
1927 {
1928 cupsdCloseClient(con);
1929 return;
1930 }
1931
1932 con->http.state = HTTP_WAITING;
1933 break;
1934
1935 default :
1936 break; /* Anti-compiler-warning-code */
1937 }
1938 }
1939 }
1940
1941 /*
1942 * Handle any incoming data...
1943 */
1944
1945 switch (con->http.state)
1946 {
1947 case HTTP_PUT_RECV :
1948 do
1949 {
1950 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
1951 {
1952 if (con->http.error && con->http.error != EPIPE)
1953 cupsdLogMessage(CUPSD_LOG_DEBUG,
1954 "cupsdReadClient: %d PUT_RECV Closing for error "
1955 "%d (%s)", con->http.fd, con->http.error,
1956 strerror(con->http.error));
1957 else
1958 cupsdLogMessage(CUPSD_LOG_DEBUG,
1959 "cupsdReadClient: %d PUT_RECV Closing on EOF",
1960 con->http.fd);
1961
1962 cupsdCloseClient(con);
1963 return;
1964 }
1965 else if (bytes > 0)
1966 {
1967 con->bytes += bytes;
1968
1969 if (write(con->file, line, bytes) < bytes)
1970 {
1971 cupsdLogMessage(CUPSD_LOG_ERROR,
1972 "cupsdReadClient: Unable to write %d bytes to %s: %s",
1973 bytes, con->filename, strerror(errno));
1974
1975 close(con->file);
1976 con->file = -1;
1977 unlink(con->filename);
1978 cupsdClearString(&con->filename);
1979
1980 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
1981 {
1982 cupsdCloseClient(con);
1983 return;
1984 }
1985 }
1986 }
1987 }
1988 while (con->http.state == HTTP_PUT_RECV && data_ready(con));
1989
1990 if (con->http.state == HTTP_WAITING)
1991 {
1992 /*
1993 * End of file, see how big it is...
1994 */
1995
1996 fstat(con->file, &filestats);
1997
1998 close(con->file);
1999 con->file = -1;
2000
2001 if (filestats.st_size > MaxRequestSize &&
2002 MaxRequestSize > 0)
2003 {
2004 /*
2005 * Request is too big; remove it and send an error...
2006 */
2007
2008 unlink(con->filename);
2009 cupsdClearString(&con->filename);
2010
2011 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2012 {
2013 cupsdCloseClient(con);
2014 return;
2015 }
2016 }
2017
2018 /*
2019 * Install the configuration file...
2020 */
2021
2022 status = install_conf_file(con);
2023
2024 /*
2025 * Return the status to the client...
2026 */
2027
2028 if (!cupsdSendError(con, status, CUPSD_AUTH_NONE))
2029 {
2030 cupsdCloseClient(con);
2031 return;
2032 }
2033 }
2034 break;
2035
2036 case HTTP_POST_RECV :
2037 do
2038 {
2039 if (con->request && con->file < 0)
2040 {
2041 /*
2042 * Grab any request data from the connection...
2043 */
2044
2045 if ((ipp_state = ippRead(&(con->http), con->request)) == IPP_ERROR)
2046 {
2047 cupsdLogMessage(CUPSD_LOG_ERROR,
2048 "cupsdReadClient: %d IPP Read Error!",
2049 con->http.fd);
2050
2051 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2052 cupsdCloseClient(con);
2053 return;
2054 }
2055 else if (ipp_state != IPP_DATA)
2056 {
2057 if (con->http.state == HTTP_POST_SEND)
2058 {
2059 cupsdSendError(con, HTTP_BAD_REQUEST, CUPSD_AUTH_NONE);
2060 cupsdCloseClient(con);
2061 return;
2062 }
2063
2064 break;
2065 }
2066 else
2067 {
2068 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReadClient: %d %d.%d %s %d",
2069 con->http.fd, con->request->request.op.version[0],
2070 con->request->request.op.version[1],
2071 ippOpString(con->request->request.op.operation_id),
2072 con->request->request.op.request_id);
2073 con->bytes += ippLength(con->request);
2074 }
2075 }
2076
2077 if (con->file < 0 && con->http.state != HTTP_POST_SEND)
2078 {
2079 /*
2080 * Create a file as needed for the request data...
2081 */
2082
2083 cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot,
2084 request_id ++);
2085 con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640);
2086
2087 if (con->file < 0)
2088 {
2089 cupsdLogMessage(CUPSD_LOG_ERROR,
2090 "Unable to create request file %s: %s",
2091 con->filename, strerror(errno));
2092
2093 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2094 {
2095 cupsdCloseClient(con);
2096 return;
2097 }
2098 }
2099
2100 fchmod(con->file, 0640);
2101 fchown(con->file, RunUser, Group);
2102 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2103 }
2104
2105 if (con->http.state != HTTP_POST_SEND)
2106 {
2107 if ((bytes = httpRead2(HTTP(con), line, sizeof(line))) < 0)
2108 {
2109 if (con->http.error && con->http.error != EPIPE)
2110 cupsdLogMessage(CUPSD_LOG_DEBUG,
2111 "cupsdReadClient: %d POST_SEND Closing for "
2112 "error %d (%s)", con->http.fd, con->http.error,
2113 strerror(con->http.error));
2114 else
2115 cupsdLogMessage(CUPSD_LOG_DEBUG,
2116 "cupsdReadClient: %d POST_SEND Closing on EOF",
2117 con->http.fd);
2118
2119 cupsdCloseClient(con);
2120 return;
2121 }
2122 else if (bytes > 0)
2123 {
2124 con->bytes += bytes;
2125
2126 if (write(con->file, line, bytes) < bytes)
2127 {
2128 cupsdLogMessage(CUPSD_LOG_ERROR,
2129 "cupsdReadClient: Unable to write %d bytes to "
2130 "%s: %s", bytes, con->filename,
2131 strerror(errno));
2132
2133 close(con->file);
2134 con->file = -1;
2135 unlink(con->filename);
2136 cupsdClearString(&con->filename);
2137
2138 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE,
2139 CUPSD_AUTH_NONE))
2140 {
2141 cupsdCloseClient(con);
2142 return;
2143 }
2144 }
2145 }
2146 else if (con->http.state == HTTP_POST_RECV)
2147 return;
2148 else if (con->http.state != HTTP_POST_SEND)
2149 {
2150 cupsdLogMessage(CUPSD_LOG_DEBUG,
2151 "cupsdReadClient: %d Closing on unknown HTTP "
2152 "state %d", con->http.fd, con->http.state);
2153 cupsdCloseClient(con);
2154 return;
2155 }
2156 }
2157 }
2158 while (con->http.state == HTTP_POST_RECV && data_ready(con));
2159
2160 if (con->http.state == HTTP_POST_SEND)
2161 {
2162 if (con->file >= 0)
2163 {
2164 fstat(con->file, &filestats);
2165
2166 close(con->file);
2167 con->file = -1;
2168
2169 if (filestats.st_size > MaxRequestSize &&
2170 MaxRequestSize > 0)
2171 {
2172 /*
2173 * Request is too big; remove it and send an error...
2174 */
2175
2176 unlink(con->filename);
2177 cupsdClearString(&con->filename);
2178
2179 if (con->request)
2180 {
2181 /*
2182 * Delete any IPP request data...
2183 */
2184
2185 ippDelete(con->request);
2186 con->request = NULL;
2187 }
2188
2189 if (!cupsdSendError(con, HTTP_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE))
2190 {
2191 cupsdCloseClient(con);
2192 return;
2193 }
2194 }
2195 else if (filestats.st_size == 0)
2196 {
2197 /*
2198 * Don't allow empty file...
2199 */
2200
2201 unlink(con->filename);
2202 cupsdClearString(&con->filename);
2203 }
2204
2205 if (con->command)
2206 {
2207 if (!cupsdSendCommand(con, con->command, con->options, 0))
2208 {
2209 if (!cupsdSendError(con, HTTP_NOT_FOUND, CUPSD_AUTH_NONE))
2210 {
2211 cupsdCloseClient(con);
2212 return;
2213 }
2214 }
2215 else
2216 cupsdLogRequest(con, HTTP_OK);
2217 }
2218 }
2219
2220 if (con->request)
2221 {
2222 cupsdProcessIPPRequest(con);
2223
2224 if (con->filename)
2225 {
2226 unlink(con->filename);
2227 cupsdClearString(&con->filename);
2228 }
2229
2230 return;
2231 }
2232 }
2233 break;
2234
2235 default :
2236 break; /* Anti-compiler-warning-code */
2237 }
2238
2239 if (con->http.state == HTTP_WAITING)
2240 {
2241 if (!con->http.keep_alive)
2242 {
2243 cupsdLogMessage(CUPSD_LOG_DEBUG,
2244 "cupsdReadClient: %d Closing because Keep-Alive disabled",
2245 con->http.fd);
2246 cupsdCloseClient(con);
2247 }
2248 else
2249 {
2250 cupsArrayRemove(ActiveClients, con);
2251 cupsdSetBusyState();
2252 }
2253 }
2254 }
2255
2256
2257 /*
2258 * 'cupsdSendCommand()' - Send output from a command via HTTP.
2259 */
2260
2261 int /* O - 1 on success, 0 on failure */
2262 cupsdSendCommand(
2263 cupsd_client_t *con, /* I - Client connection */
2264 char *command, /* I - Command to run */
2265 char *options, /* I - Command-line options */
2266 int root) /* I - Run as root? */
2267 {
2268 int fd; /* Standard input file descriptor */
2269
2270
2271 if (con->filename)
2272 {
2273 fd = open(con->filename, O_RDONLY);
2274
2275 if (fd < 0)
2276 {
2277 cupsdLogMessage(CUPSD_LOG_ERROR,
2278 "cupsdSendCommand: %d Unable to open \"%s\" for reading: %s",
2279 con->http.fd, con->filename ? con->filename : "/dev/null",
2280 strerror(errno));
2281 return (0);
2282 }
2283
2284 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
2285 }
2286 else
2287 fd = -1;
2288
2289 con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root);
2290
2291 if (fd >= 0)
2292 close(fd);
2293
2294 cupsdLogMessage(CUPSD_LOG_INFO, "Started \"%s\" (pid=%d)", command,
2295 con->pipe_pid);
2296
2297 cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSendCommand: %d file=%d",
2298 con->http.fd, con->file);
2299
2300 if (con->pipe_pid == 0)
2301 return (0);
2302
2303 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
2304
2305 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2306
2307 con->sent_header = 0;
2308 con->file_ready = 0;
2309 con->got_fields = 0;
2310 con->header_used = 0;
2311
2312 return (1);
2313 }
2314
2315
2316 /*
2317 * 'cupsdSendError()' - Send an error message via HTTP.
2318 */
2319
2320 int /* O - 1 if successful, 0 otherwise */
2321 cupsdSendError(cupsd_client_t *con, /* I - Connection */
2322 http_status_t code, /* I - Error code */
2323 int auth_type)/* I - Authentication type */
2324 {
2325 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2326 "cupsdSendError(con=%p(%d), code=%d, auth_type=%d", con,
2327 con->http.fd, code, auth_type);
2328
2329 #ifdef HAVE_SSL
2330 /*
2331 * Force client to upgrade for authentication if that is how the
2332 * server is configured...
2333 */
2334
2335 if (code == HTTP_UNAUTHORIZED &&
2336 DefaultEncryption == HTTP_ENCRYPT_REQUIRED &&
2337 strcasecmp(con->http.hostname, "localhost") &&
2338 !con->http.tls)
2339 {
2340 code = HTTP_UPGRADE_REQUIRED;
2341 }
2342 #endif /* HAVE_SSL */
2343
2344 /*
2345 * Put the request in the access_log file...
2346 */
2347
2348 cupsdLogRequest(con, code);
2349
2350 /*
2351 * To work around bugs in some proxies, don't use Keep-Alive for some
2352 * error messages...
2353 *
2354 * Kerberos authentication doesn't work without Keep-Alive, so
2355 * never disable it in that case.
2356 */
2357
2358 if (code >= HTTP_BAD_REQUEST && con->http.auth_type != CUPSD_AUTH_NEGOTIATE)
2359 con->http.keep_alive = HTTP_KEEPALIVE_OFF;
2360
2361 /*
2362 * Send an error message back to the client. If the error code is a
2363 * 400 or 500 series, make sure the message contains some text, too!
2364 */
2365
2366 if (!cupsdSendHeader(con, code, NULL, auth_type))
2367 return (0);
2368
2369 #ifdef HAVE_SSL
2370 if (code == HTTP_UPGRADE_REQUIRED)
2371 if (httpPrintf(HTTP(con), "Connection: Upgrade\r\n") < 0)
2372 return (0);
2373
2374 if (httpPrintf(HTTP(con), "Upgrade: TLS/1.0,HTTP/1.1\r\n") < 0)
2375 return (0);
2376 #endif /* HAVE_SSL */
2377
2378 if (con->http.version >= HTTP_1_1 &&
2379 con->http.keep_alive == HTTP_KEEPALIVE_OFF)
2380 {
2381 if (httpPrintf(HTTP(con), "Connection: close\r\n") < 0)
2382 return (0);
2383 }
2384
2385 if (code >= HTTP_BAD_REQUEST)
2386 {
2387 /*
2388 * Send a human-readable error message.
2389 */
2390
2391 char message[4096], /* Message for user */
2392 urltext[1024], /* URL redirection text */
2393 redirect[1024]; /* Redirection link */
2394 const char *text; /* Status-specific text */
2395
2396
2397 redirect[0] = '\0';
2398
2399 if (code == HTTP_UNAUTHORIZED)
2400 text = _cupsLangString(con->language,
2401 _("Enter your username and password or the "
2402 "root username and password to access this "
2403 "page. If you are using Kerberos authentication, "
2404 "make sure you have a valid Kerberos ticket."));
2405 else if (code == HTTP_UPGRADE_REQUIRED)
2406 {
2407 text = urltext;
2408
2409 snprintf(urltext, sizeof(urltext),
2410 _cupsLangString(con->language,
2411 _("You must access this page using the URL "
2412 "<A HREF=\"https://%s:%d%s\">"
2413 "https://%s:%d%s</A>.")),
2414 con->servername, con->serverport, con->uri,
2415 con->servername, con->serverport, con->uri);
2416
2417 snprintf(redirect, sizeof(redirect),
2418 "<META HTTP-EQUIV=\"Refresh\" "
2419 "CONTENT=\"3;URL=https://%s:%d%s\">\n",
2420 con->servername, con->serverport, con->uri);
2421 }
2422 else
2423 text = "";
2424
2425 snprintf(message, sizeof(message),
2426 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" "
2427 "\"http://www.w3.org/TR/html4/loose.dtd\">\n"
2428 "<HTML>\n"
2429 "<HEAD>\n"
2430 "\t<META HTTP-EQUIV=\"Content-Type\" "
2431 "CONTENT=\"text/html; charset=utf-8\">\n"
2432 "\t<TITLE>%d %s</TITLE>\n"
2433 "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" "
2434 "HREF=\"/cups.css\">\n"
2435 "%s"
2436 "</HEAD>\n"
2437 "<BODY>\n"
2438 "<H1>%d %s</H1>\n"
2439 "<P>%s</P>\n"
2440 "</BODY>\n"
2441 "</HTML>\n",
2442 code, httpStatus(code), redirect, code, httpStatus(code), text);
2443
2444 if (httpPrintf(HTTP(con), "Content-Type: text/html; charset=utf-8\r\n") < 0)
2445 return (0);
2446 if (httpPrintf(HTTP(con), "Content-Length: %d\r\n",
2447 (int)strlen(message)) < 0)
2448 return (0);
2449 if (httpPrintf(HTTP(con), "\r\n") < 0)
2450 return (0);
2451 if (httpPrintf(HTTP(con), "%s", message) < 0)
2452 return (0);
2453 }
2454 else if (httpPrintf(HTTP(con), "\r\n") < 0)
2455 return (0);
2456
2457 if (cupsdFlushHeader(con) < 0)
2458 return (0);
2459
2460 con->http.state = HTTP_WAITING;
2461
2462 return (1);
2463 }
2464
2465
2466 /*
2467 * 'cupsdSendHeader()' - Send an HTTP request.
2468 */
2469
2470 int /* O - 1 on success, 0 on failure */
2471 cupsdSendHeader(
2472 cupsd_client_t *con, /* I - Client to send to */
2473 http_status_t code, /* I - HTTP status code */
2474 char *type, /* I - MIME type of document */
2475 int auth_type) /* I - Type of authentication */
2476 {
2477 char auth_str[1024]; /* Authorization string */
2478 #ifdef HAVE_GSSAPI
2479 static char *gss_buf = NULL; /* Kerberos auth data buffer */
2480 static int gss_bufsize = 0; /* Size of Kerberos auth data buffer */
2481 #endif /* HAVE_GSSAPI */
2482
2483
2484 /*
2485 * Send the HTTP status header...
2486 */
2487
2488 if (code == HTTP_CONTINUE)
2489 {
2490 /*
2491 * 100-continue doesn't send any headers...
2492 */
2493
2494 return (httpPrintf(HTTP(con), "HTTP/%d.%d 100 Continue\r\n\r\n",
2495 con->http.version / 100, con->http.version % 100) > 0);
2496 }
2497
2498 httpFlushWrite(HTTP(con));
2499
2500 con->http.data_encoding = HTTP_ENCODE_FIELDS;
2501
2502 if (httpPrintf(HTTP(con), "HTTP/%d.%d %d %s\r\n", con->http.version / 100,
2503 con->http.version % 100, code, httpStatus(code)) < 0)
2504 return (0);
2505 if (httpPrintf(HTTP(con), "Date: %s\r\n", httpGetDateString(time(NULL))) < 0)
2506 return (0);
2507 if (ServerHeader)
2508 if (httpPrintf(HTTP(con), "Server: %s\r\n", ServerHeader) < 0)
2509 return (0);
2510 if (con->http.keep_alive && con->http.version >= HTTP_1_0)
2511 {
2512 if (httpPrintf(HTTP(con), "Connection: Keep-Alive\r\n") < 0)
2513 return (0);
2514 if (httpPrintf(HTTP(con), "Keep-Alive: timeout=%d\r\n",
2515 KeepAliveTimeout) < 0)
2516 return (0);
2517 }
2518 if (code == HTTP_METHOD_NOT_ALLOWED)
2519 if (httpPrintf(HTTP(con), "Allow: GET, HEAD, OPTIONS, POST, PUT\r\n") < 0)
2520 return (0);
2521
2522 if (code == HTTP_UNAUTHORIZED)
2523 {
2524 if (auth_type == CUPSD_AUTH_NONE)
2525 {
2526 if (!con->best || con->best->type <= CUPSD_AUTH_NONE)
2527 auth_type = DefaultAuthType;
2528 else
2529 auth_type = con->best->type;
2530 }
2531
2532 auth_str[0] = '\0';
2533
2534 if (auth_type == CUPSD_AUTH_BASIC || auth_type == CUPSD_AUTH_BASICDIGEST)
2535 strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str));
2536 else if (auth_type == CUPSD_AUTH_DIGEST)
2537 snprintf(auth_str, sizeof(auth_str), "Digest realm=\"CUPS\", nonce=\"%s\"",
2538 con->http.hostname);
2539 #ifdef HAVE_GSSAPI
2540 else if (auth_type == CUPSD_AUTH_NEGOTIATE && con->gss_output_token.length == 0)
2541 strlcpy(auth_str, "Negotiate", sizeof(auth_str));
2542 #endif /* HAVE_GSSAPI */
2543
2544 if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE &&
2545 !strcasecmp(con->http.hostname, "localhost"))
2546 {
2547 /*
2548 * Add a "trc" (try root certification) parameter for local non-Kerberos
2549 * requests when the request requires system group membership - then the
2550 * client knows the root certificate can/should be used.
2551 *
2552 * Also, for Mac OS X we also look for @AUTHKEY and add an "authkey"
2553 * parameter as needed...
2554 */
2555
2556 int i; /* Looping var */
2557 char *auth_key; /* Auth key buffer */
2558 size_t auth_size; /* Size of remaining buffer */
2559
2560 auth_key = auth_str + strlen(auth_str);
2561 auth_size = sizeof(auth_str) - (auth_key - auth_str);
2562
2563 for (i = 0; i < con->best->num_names; i ++)
2564 {
2565 #ifdef HAVE_AUTHORIZATION_H
2566 if (!strncasecmp(con->best->names[i], "@AUTHKEY(", 9))
2567 {
2568 snprintf(auth_key, auth_size, ", authkey=\"%s\"",
2569 con->best->names[i] + 9);
2570 /* end parenthesis is stripped in conf.c */
2571 break;
2572 }
2573 else
2574 #endif /* HAVE_AUTHORIZATION_H */
2575 if (!strcasecmp(con->best->names[i], "@SYSTEM"))
2576 {
2577 #ifdef HAVE_AUTHORIZATION_H
2578 if (SystemGroupAuthKey)
2579 snprintf(auth_key, auth_size,
2580 ", authkey=\"%s\", trc=\"y\"",
2581 SystemGroupAuthKey);
2582 else
2583 #else
2584 strlcpy(auth_key, ", trc=\"y\"", auth_size);
2585 #endif /* HAVE_AUTHORIZATION_H */
2586 break;
2587 }
2588 }
2589 }
2590
2591 if (auth_str[0])
2592 {
2593 cupsdLogMessage(CUPSD_LOG_DEBUG,
2594 "cupsdSendHeader: %d WWW-Authenticate: %s", con->http.fd,
2595 auth_str);
2596
2597 if (httpPrintf(HTTP(con), "WWW-Authenticate: %s\r\n", auth_str) < 0)
2598 return (0);
2599 }
2600 }
2601
2602 #ifdef HAVE_GSSAPI
2603 /*
2604 * WWW-Authenticate: Negotiate can be included even for
2605 * non-401 replies...
2606 */
2607
2608 if (con->gss_output_token.length > 0 && con->gss_output_token.length <= 65536)
2609 {
2610 OM_uint32 minor_status; /* Minor status code */
2611 int bufsize; /* Size of output token buffer */
2612
2613
2614 bufsize = con->gss_output_token.length * 4 / 3 + 2;
2615
2616 if (bufsize > gss_bufsize)
2617 {
2618 char *buf; /* New buffer */
2619
2620
2621 bufsize = (bufsize + 1023) & 1023;/* Round up */
2622
2623 if (gss_buf)
2624 buf = realloc(gss_buf, bufsize);
2625 else
2626 buf = malloc(bufsize);
2627
2628 if (!buf)
2629 {
2630 cupsdLogMessage(CUPSD_LOG_ERROR,
2631 "Unable to allocate %d bytes for Kerberos credentials!",
2632 bufsize);
2633 return (0);
2634 }
2635
2636 gss_buf = buf;
2637 gss_bufsize = bufsize;
2638 }
2639
2640 httpEncode64_2(gss_buf, gss_bufsize,
2641 con->gss_output_token.value,
2642 con->gss_output_token.length);
2643 gss_release_buffer(&minor_status, &con->gss_output_token);
2644
2645 cupsdLogMessage(CUPSD_LOG_DEBUG,
2646 "cupsdSendHeader: WWW-Authenticate: Negotiate %s", gss_buf);
2647
2648 if (httpPrintf(HTTP(con), "WWW-Authenticate: Negotiate %s\r\n",
2649 gss_buf) < 0)
2650 return (0);
2651 }
2652 else if (con->gss_output_token.length > 65536)
2653 {
2654 cupsdLogMessage(CUPSD_LOG_ERROR,
2655 "Kerberos credentials larger than 64k (%d)!",
2656 (int)con->gss_output_token.length);
2657 return (0);
2658 }
2659 #endif /* HAVE_GSSAPI */
2660
2661 if (con->language && strcmp(con->language->language, "C"))
2662 {
2663 if (httpPrintf(HTTP(con), "Content-Language: %s\r\n",
2664 con->language->language) < 0)
2665 return (0);
2666 }
2667
2668 if (type)
2669 {
2670 if (!strcmp(type, "text/html"))
2671 {
2672 if (httpPrintf(HTTP(con),
2673 "Content-Type: text/html; charset=utf-8\r\n") < 0)
2674 return (0);
2675 }
2676 else if (httpPrintf(HTTP(con), "Content-Type: %s\r\n", type) < 0)
2677 return (0);
2678 }
2679
2680 return (1);
2681 }
2682
2683
2684 /*
2685 * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs.
2686 */
2687
2688 void
2689 cupsdUpdateCGI(void)
2690 {
2691 char *ptr, /* Pointer to end of line in buffer */
2692 message[1024]; /* Pointer to message text */
2693 int loglevel; /* Log level for message */
2694
2695
2696 while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel,
2697 message, sizeof(message))) != NULL)
2698 {
2699 if (loglevel == CUPSD_LOG_INFO)
2700 cupsdLogMessage(CUPSD_LOG_INFO, "%s", message);
2701
2702 if (!strchr(CGIStatusBuffer->buffer, '\n'))
2703 break;
2704 }
2705
2706 if (ptr == NULL && !CGIStatusBuffer->bufused)
2707 {
2708 /*
2709 * Fatal error on pipe - should never happen!
2710 */
2711
2712 cupsdLogMessage(CUPSD_LOG_CRIT,
2713 "cupsdUpdateCGI: error reading from CGI error pipe - %s",
2714 strerror(errno));
2715 }
2716 }
2717
2718
2719 /*
2720 * 'cupsdWriteClient()' - Write data to a client as needed.
2721 */
2722
2723 void
2724 cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */
2725 {
2726 int bytes, /* Number of bytes written */
2727 field_col; /* Current column */
2728 char *bufptr, /* Pointer into buffer */
2729 *bufend; /* Pointer to end of buffer */
2730 ipp_state_t ipp_state; /* IPP state value */
2731
2732
2733 cupsdLogMessage(CUPSD_LOG_DEBUG2,
2734 "cupsdWriteClient(con=%p(%d)) response=%p(%d), file=%d "
2735 "pipe_pid=%d state=%d",
2736 con, con->http.fd, con->response,
2737 con->response ? con->response->state : -1,
2738 con->file, con->pipe_pid, con->http.state);
2739
2740 if (con->http.state != HTTP_GET_SEND &&
2741 con->http.state != HTTP_POST_SEND)
2742 {
2743 /*
2744 * If we get called in the wrong state, then something went wrong with the
2745 * connection and we need to shut it down...
2746 */
2747
2748 cupsdLogMessage(CUPSD_LOG_DEBUG,
2749 "cupsdWriteClient: %d Closing on unknown HTTP state %d",
2750 con->http.fd, con->http.state);
2751 cupsdCloseClient(con);
2752 return;
2753 }
2754
2755 if (con->pipe_pid)
2756 {
2757 /*
2758 * Make sure we select on the CGI output...
2759 */
2760
2761 cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con);
2762
2763 if (!con->file_ready)
2764 {
2765 /*
2766 * Try again later when there is CGI output available...
2767 */
2768
2769 cupsdRemoveSelect(con->http.fd);
2770 return;
2771 }
2772
2773 con->file_ready = 0;
2774 }
2775
2776 if (con->response && con->response->state != IPP_DATA)
2777 {
2778 ipp_state = ippWrite(HTTP(con), con->response);
2779 bytes = ipp_state != IPP_ERROR &&
2780 (con->file >= 0 || ipp_state != IPP_DATA);
2781 }
2782 else if ((bytes = read(con->file, con->header,
2783 sizeof(con->header) - con->header_used)) > 0)
2784 {
2785 con->header_used += bytes;
2786
2787 if (con->pipe_pid && !con->got_fields)
2788 {
2789 /*
2790 * Inspect the data for Content-Type and other fields.
2791 */
2792
2793 for (bufptr = con->header, bufend = con->header + con->header_used,
2794 field_col = 0;
2795 !con->got_fields && bufptr < bufend;
2796 bufptr ++)
2797 {
2798 if (*bufptr == '\n')
2799 {
2800 /*
2801 * Send line to client...
2802 */
2803
2804 if (bufptr > con->header && bufptr[-1] == '\r')
2805 bufptr[-1] = '\0';
2806 *bufptr++ = '\0';
2807
2808 cupsdLogMessage(CUPSD_LOG_DEBUG, "Script header: %s", con->header);
2809
2810 if (!con->sent_header)
2811 {
2812 /*
2813 * Handle redirection and CGI status codes...
2814 */
2815
2816 if (!strncasecmp(con->header, "Location:", 9))
2817 {
2818 cupsdSendHeader(con, HTTP_SEE_OTHER, NULL, CUPSD_AUTH_NONE);
2819 con->sent_header = 2;
2820
2821 if (httpPrintf(HTTP(con), "Content-Length: 0\r\n") < 0)
2822 return;
2823 }
2824 else if (!strncasecmp(con->header, "Status:", 7))
2825 {
2826 cupsdSendError(con, (http_status_t)atoi(con->header + 7),
2827 CUPSD_AUTH_NONE);
2828 con->sent_header = 2;
2829 }
2830 else
2831 {
2832 cupsdSendHeader(con, HTTP_OK, NULL, CUPSD_AUTH_NONE);
2833 con->sent_header = 1;
2834
2835 if (con->http.version == HTTP_1_1)
2836 {
2837 if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n") < 0)
2838 return;
2839 }
2840 }
2841 }
2842
2843 if (strncasecmp(con->header, "Status:", 7))
2844 httpPrintf(HTTP(con), "%s\r\n", con->header);
2845
2846 /*
2847 * Update buffer...
2848 */
2849
2850 con->header_used -= bufptr - con->header;
2851
2852 if (con->header_used > 0)
2853 memmove(con->header, bufptr, con->header_used);
2854
2855 bufptr = con->header - 1;
2856
2857 /*
2858 * See if the line was empty...
2859 */
2860
2861 if (field_col == 0)
2862 {
2863 con->got_fields = 1;
2864
2865 if (cupsdFlushHeader(con) < 0)
2866 {
2867 cupsdCloseClient(con);
2868 return;
2869 }
2870
2871 if (con->http.version == HTTP_1_1)
2872 con->http.data_encoding = HTTP_ENCODE_CHUNKED;
2873 }
2874 else
2875 field_col = 0;
2876 }
2877 else if (*bufptr != '\r')
2878 field_col ++;
2879 }
2880
2881 if (!con->got_fields)
2882 {
2883 con->http.activity = time(NULL);
2884 return;
2885 }
2886 }
2887
2888 if (con->header_used > 0)
2889 {
2890 if (httpWrite2(HTTP(con), con->header, con->header_used) < 0)
2891 {
2892 cupsdLogMessage(CUPSD_LOG_DEBUG,
2893 "cupsdWriteClient: %d Closing for error %d (%s)",
2894 con->http.fd, con->http.error,
2895 strerror(con->http.error));
2896 cupsdCloseClient(con);
2897 return;
2898 }
2899
2900 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED)
2901 httpFlushWrite(HTTP(con));
2902
2903 con->bytes += con->header_used;
2904
2905 if (con->http.state == HTTP_WAITING)
2906 bytes = 0;
2907 else
2908 bytes = con->header_used;
2909
2910 con->header_used = 0;
2911 }
2912 }
2913
2914 if (bytes <= 0 ||
2915 (con->http.state != HTTP_GET_SEND && con->http.state != HTTP_POST_SEND))
2916 {
2917 if (!con->sent_header && con->pipe_pid)
2918 cupsdSendError(con, HTTP_SERVER_ERROR, CUPSD_AUTH_NONE);
2919 else
2920 {
2921 cupsdLogRequest(con, HTTP_OK);
2922
2923 httpFlushWrite(HTTP(con));
2924
2925 if (con->http.data_encoding == HTTP_ENCODE_CHUNKED && con->sent_header == 1)
2926 {
2927 if (httpWrite2(HTTP(con), "", 0) < 0)
2928 {
2929 cupsdLogMessage(CUPSD_LOG_DEBUG,
2930 "cupsdWriteClient: %d Closing for error %d (%s)",
2931 con->http.fd, con->http.error,
2932 strerror(con->http.error));
2933 cupsdCloseClient(con);
2934 return;
2935 }
2936 }
2937 }
2938
2939 con->http.state = HTTP_WAITING;
2940
2941 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient, NULL, con);
2942
2943 if (con->file >= 0)
2944 {
2945 cupsdRemoveSelect(con->file);
2946
2947 if (con->pipe_pid)
2948 cupsdEndProcess(con->pipe_pid, 0);
2949
2950 close(con->file);
2951 con->file = -1;
2952 con->pipe_pid = 0;
2953 }
2954
2955 if (con->filename)
2956 {
2957 unlink(con->filename);
2958 cupsdClearString(&con->filename);
2959 }
2960
2961 if (con->request)
2962 {
2963 ippDelete(con->request);
2964 con->request = NULL;
2965 }
2966
2967 if (con->response)
2968 {
2969 ippDelete(con->response);
2970 con->response = NULL;
2971 }
2972
2973 cupsdClearString(&con->command);
2974 cupsdClearString(&con->options);
2975 cupsdClearString(&con->query_string);
2976
2977 if (!con->http.keep_alive)
2978 {
2979 cupsdLogMessage(CUPSD_LOG_DEBUG,
2980 "cupsdWriteClient: %d Closing because Keep-Alive disabled",
2981 con->http.fd);
2982 cupsdCloseClient(con);
2983 return;
2984 }
2985 else
2986 {
2987 cupsArrayRemove(ActiveClients, con);
2988 cupsdSetBusyState();
2989 }
2990 }
2991
2992 con->http.activity = time(NULL);
2993 }
2994
2995
2996 /*
2997 * 'check_if_modified()' - Decode an "If-Modified-Since" line.
2998 */
2999
3000 static int /* O - 1 if modified since */
3001 check_if_modified(
3002 cupsd_client_t *con, /* I - Client connection */
3003 struct stat *filestats) /* I - File information */
3004 {
3005 char *ptr; /* Pointer into field */
3006 time_t date; /* Time/date value */
3007 off_t size; /* Size/length value */
3008
3009
3010 size = 0;
3011 date = 0;
3012 ptr = con->http.fields[HTTP_FIELD_IF_MODIFIED_SINCE];
3013
3014 if (*ptr == '\0')
3015 return (1);
3016
3017 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3018 "check_if_modified(con=%p(%d), "
3019 "filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"",
3020 con, con->http.fd, filestats, CUPS_LLCAST filestats->st_size,
3021 (int)filestats->st_mtime, ptr);
3022
3023 while (*ptr != '\0')
3024 {
3025 while (isspace(*ptr) || *ptr == ';')
3026 ptr ++;
3027
3028 if (strncasecmp(ptr, "length=", 7) == 0)
3029 {
3030 ptr += 7;
3031 size = strtoll(ptr, NULL, 10);
3032
3033 while (isdigit(*ptr))
3034 ptr ++;
3035 }
3036 else if (isalpha(*ptr))
3037 {
3038 date = httpGetDateTime(ptr);
3039 while (*ptr != '\0' && *ptr != ';')
3040 ptr ++;
3041 }
3042 else
3043 ptr ++;
3044 }
3045
3046 return ((size != filestats->st_size && size != 0) ||
3047 (date < filestats->st_mtime && date != 0) ||
3048 (size == 0 && date == 0));
3049 }
3050
3051
3052 /*
3053 * 'compare_clients()' - Compare two client connections.
3054 */
3055
3056 static int /* O - Result of comparison */
3057 compare_clients(cupsd_client_t *a, /* I - First client */
3058 cupsd_client_t *b, /* I - Second client */
3059 void *data) /* I - User data (not used) */
3060 {
3061 (void)data;
3062
3063 if (a == b)
3064 return (0);
3065 else if (a < b)
3066 return (-1);
3067 else
3068 return (1);
3069 }
3070
3071
3072 /*
3073 * 'data_ready()' - Check whether data is available from a client.
3074 */
3075
3076 static int /* O - 1 if data is ready, 0 otherwise */
3077 data_ready(cupsd_client_t *con) /* I - Client */
3078 {
3079 if (con->http.used > 0)
3080 return (1);
3081 #ifdef HAVE_SSL
3082 else if (con->http.tls)
3083 {
3084 # ifdef HAVE_LIBSSL
3085 if (SSL_pending((SSL *)(con->http.tls)))
3086 return (1);
3087 # elif defined(HAVE_GNUTLS)
3088 if (gnutls_record_check_pending(((http_tls_t *)(con->http.tls))->session))
3089 return (1);
3090 # elif defined(HAVE_CDSASSL)
3091 size_t bytes; /* Bytes that are available */
3092
3093 if (!SSLGetBufferedReadSize(((http_tls_t *)(con->http.tls))->session,
3094 &bytes) && bytes > 0)
3095 return (1);
3096 # endif /* HAVE_LIBSSL */
3097 }
3098 #endif /* HAVE_SSL */
3099
3100 return (0);
3101 }
3102
3103
3104 #ifdef HAVE_SSL
3105 /*
3106 * 'encrypt_client()' - Enable encryption for the client...
3107 */
3108
3109 static int /* O - 1 on success, 0 on error */
3110 encrypt_client(cupsd_client_t *con) /* I - Client to encrypt */
3111 {
3112 # ifdef HAVE_LIBSSL
3113 SSL_CTX *context; /* Context for encryption */
3114 SSL *conn; /* Connection for encryption */
3115 BIO *bio; /* BIO data */
3116 unsigned long error; /* Error code */
3117
3118
3119 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3120 con->http.fd);
3121
3122 /*
3123 * Verify that we have a certificate...
3124 */
3125
3126 if (access(ServerKey, 0) || access(ServerCertificate, 0))
3127 {
3128 /*
3129 * Nope, make a self-signed certificate...
3130 */
3131
3132 if (!make_certificate(con))
3133 return (0);
3134 }
3135
3136 /*
3137 * Create the SSL context and accept the connection...
3138 */
3139
3140 context = SSL_CTX_new(SSLv23_server_method());
3141
3142 SSL_CTX_set_options(context, SSL_OP_NO_SSLv2); /* Only use SSLv3 or TLS */
3143 if (SSLOptions & CUPSD_SSL_NOEMPTY)
3144 SSL_CTX_set_options(context, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
3145 SSL_CTX_use_PrivateKey_file(context, ServerKey, SSL_FILETYPE_PEM);
3146 SSL_CTX_use_certificate_chain_file(context, ServerCertificate);
3147
3148 bio = BIO_new(_httpBIOMethods());
3149 BIO_ctrl(bio, BIO_C_SET_FILE_PTR, 0, (char *)HTTP(con));
3150
3151 conn = SSL_new(context);
3152 SSL_set_bio(conn, bio, bio);
3153
3154 if (SSL_accept(conn) != 1)
3155 {
3156 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to encrypt connection from %s!",
3157 con->http.hostname);
3158
3159 while ((error = ERR_get_error()) != 0)
3160 cupsdLogMessage(CUPSD_LOG_ERROR, "%s", ERR_error_string(error, NULL));
3161
3162 SSL_CTX_free(context);
3163 SSL_free(conn);
3164 return (0);
3165 }
3166
3167 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3168 con->http.hostname);
3169
3170 con->http.tls = conn;
3171 return (1);
3172
3173 # elif defined(HAVE_GNUTLS)
3174 http_tls_t *conn; /* TLS session object */
3175 int error; /* Error code */
3176 gnutls_certificate_server_credentials *credentials;
3177 /* TLS credentials */
3178
3179
3180 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3181 con->http.fd);
3182
3183 /*
3184 * Verify that we have a certificate...
3185 */
3186
3187 if (access(ServerKey, 0) || access(ServerCertificate, 0))
3188 {
3189 /*
3190 * Nope, make a self-signed certificate...
3191 */
3192
3193 if (!make_certificate(con))
3194 return (0);
3195 }
3196
3197 /*
3198 * Create the SSL object and perform the SSL handshake...
3199 */
3200
3201 conn = (http_tls_t *)malloc(sizeof(http_tls_t));
3202
3203 if (conn == NULL)
3204 return (0);
3205
3206 credentials = (gnutls_certificate_server_credentials *)
3207 malloc(sizeof(gnutls_certificate_server_credentials));
3208 if (credentials == NULL)
3209 {
3210 cupsdLogMessage(CUPSD_LOG_ERROR,
3211 "Unable to encrypt connection from %s - %s",
3212 con->http.hostname, strerror(errno));
3213
3214 free(conn);
3215 return (0);
3216 }
3217
3218 gnutls_certificate_allocate_credentials(credentials);
3219 gnutls_certificate_set_x509_key_file(*credentials, ServerCertificate,
3220 ServerKey, GNUTLS_X509_FMT_PEM);
3221
3222 gnutls_init(&(conn->session), GNUTLS_SERVER);
3223 gnutls_set_default_priority(conn->session);
3224 gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, *credentials);
3225 gnutls_transport_set_ptr(conn->session, (gnutls_transport_ptr)HTTP(con));
3226 gnutls_transport_set_pull_function(conn->session, _httpReadGNUTLS);
3227 gnutls_transport_set_push_function(conn->session, _httpWriteGNUTLS);
3228
3229 error = gnutls_handshake(conn->session);
3230
3231 if (error != GNUTLS_E_SUCCESS)
3232 {
3233 cupsdLogMessage(CUPSD_LOG_ERROR,
3234 "Unable to encrypt connection from %s - %s",
3235 con->http.hostname, gnutls_strerror(error));
3236
3237 gnutls_deinit(conn->session);
3238 gnutls_certificate_free_credentials(*credentials);
3239 free(conn);
3240 free(credentials);
3241 return (0);
3242 }
3243
3244 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3245 con->http.hostname);
3246
3247 conn->credentials = credentials;
3248 con->http.tls = conn;
3249 return (1);
3250
3251 # elif defined(HAVE_CDSASSL)
3252 OSStatus error; /* Error code */
3253 http_tls_t *conn; /* CDSA connection information */
3254
3255
3256 cupsdLogMessage(CUPSD_LOG_DEBUG2, "encrypt_client(con=%p(%d))", con,
3257 con->http.fd);
3258
3259 if ((conn = (http_tls_t *)malloc(sizeof(http_tls_t))) == NULL)
3260 return (0);
3261
3262 error = 0;
3263 conn->session = NULL;
3264 conn->certsArray = get_cdsa_certificate(con);
3265
3266 if (!conn->certsArray)
3267 {
3268 /*
3269 * No keychain (yet), make a self-signed certificate...
3270 */
3271
3272 if (make_certificate(con))
3273 conn->certsArray = get_cdsa_certificate(con);
3274 }
3275
3276 if (!conn->certsArray)
3277 {
3278 cupsdLogMessage(CUPSD_LOG_ERROR,
3279 "Could not find signing key in keychain \"%s\"",
3280 ServerCertificate);
3281 error = errSSLBadCert; /* errSSLBadConfiguration is a better choice, but not available on 10.2.x */
3282 }
3283
3284 if (!error)
3285 error = SSLNewContext(true, &conn->session);
3286
3287 if (!error)
3288 error = SSLSetIOFuncs(conn->session, _httpReadCDSA, _httpWriteCDSA);
3289
3290 if (!error)
3291 error = SSLSetProtocolVersionEnabled(conn->session, kSSLProtocol2, false);
3292
3293 if (!error)
3294 error = SSLSetConnection(conn->session, HTTP(con));
3295
3296 if (!error)
3297 error = SSLSetAllowsExpiredCerts(conn->session, true);
3298
3299 if (!error)
3300 error = SSLSetAllowsAnyRoot(conn->session, true);
3301
3302 if (!error)
3303 error = SSLSetCertificate(conn->session, conn->certsArray);
3304
3305 if (!error)
3306 {
3307 /*
3308 * Perform SSL/TLS handshake
3309 */
3310
3311 while ((error = SSLHandshake(conn->session)) == errSSLWouldBlock)
3312 usleep(1000);
3313 }
3314
3315 if (error)
3316 {
3317 cupsdLogMessage(CUPSD_LOG_ERROR,
3318 "Unable to encrypt connection from %s - %s (%d)",
3319 con->http.hostname, cssmErrorString(error), (int)error);
3320
3321 con->http.error = error;
3322 con->http.status = HTTP_ERROR;
3323
3324 if (conn->session)
3325 SSLDisposeContext(conn->session);
3326
3327 if (conn->certsArray)
3328 CFRelease(conn->certsArray);
3329
3330 free(conn);
3331
3332 return (0);
3333 }
3334
3335 cupsdLogMessage(CUPSD_LOG_DEBUG, "Connection from %s now encrypted.",
3336 con->http.hostname);
3337
3338 con->http.tls = conn;
3339 return (1);
3340
3341 # endif /* HAVE_LIBSSL */
3342 }
3343 #endif /* HAVE_SSL */
3344
3345
3346 #ifdef HAVE_CDSASSL
3347 /*
3348 * 'get_cdsa_certificate()' - Get a SSL/TLS certificate from the System keychain.
3349 */
3350
3351 static CFArrayRef /* O - Array of certificates */
3352 get_cdsa_certificate(
3353 cupsd_client_t *con) /* I - Client connection */
3354 {
3355 OSStatus err; /* Error info */
3356 SecKeychainRef keychain; /* Keychain reference */
3357 SecIdentitySearchRef search; /* Search reference */
3358 SecIdentityRef identity; /* Identity */
3359 CFArrayRef certificates = NULL;
3360 /* Certificate array */
3361
3362
3363 if ((err = SecKeychainOpen(ServerCertificate, &keychain)))
3364 {
3365 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot open keychain \"%s\" - %s (%d)",
3366 ServerCertificate, cssmErrorString(err), (int)err);
3367 return (NULL);
3368 }
3369
3370 # if HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY
3371 /*
3372 * Use a policy to search for valid certificates who's common name matches the
3373 * servername...
3374 */
3375
3376 SecPolicySearchRef policy_search; /* Policy search ref */
3377 SecPolicyRef policy; /* Policy ref */
3378 CSSM_DATA options; /* Policy options */
3379 CSSM_APPLE_TP_SSL_OPTIONS
3380 ssl_options; /* SSL Option for hostname */
3381 char localname[1024];/* Local hostname */
3382
3383
3384 if (SecPolicySearchCreate(CSSM_CERT_X_509v3, &CSSMOID_APPLE_TP_SSL,
3385 NULL, &policy_search))
3386 {
3387 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot create a policy search reference");
3388 CFRelease(keychain);
3389 return (NULL);
3390 }
3391
3392 if (SecPolicySearchCopyNext(policy_search, &policy))
3393 {
3394 cupsdLogMessage(CUPSD_LOG_ERROR,
3395 "Cannot find a policy to use for searching");
3396 CFRelease(keychain);
3397 CFRelease(policy_search);
3398 return (NULL);
3399 }
3400
3401 memset(&ssl_options, 0, sizeof(ssl_options));
3402 ssl_options.Version = CSSM_APPLE_TP_SSL_OPTS_VERSION;
3403 ssl_options.ServerName = con->servername;
3404 ssl_options.ServerNameLen = strlen(con->servername);
3405
3406 cupsdLogMessage(CUPSD_LOG_DEBUG,
3407 "get_cdsa_certificate: Looking for certs for \"%s\"...",
3408 con->servername);
3409
3410 options.Data = (uint8 *)&ssl_options;
3411 options.Length = sizeof(ssl_options);
3412
3413 if (SecPolicySetValue(policy, &options))
3414 {
3415 cupsdLogMessage(CUPSD_LOG_ERROR,
3416 "Cannot set policy value to use for searching");
3417 CFRelease(keychain);
3418 CFRelease(policy_search);
3419 return (NULL);
3420 }
3421
3422 err = SecIdentitySearchCreateWithPolicy(policy, NULL, CSSM_KEYUSE_SIGN,
3423 keychain, FALSE, &search);
3424 if (err && DNSSDHostName)
3425 {
3426 /*
3427 * Search for the connection server name failed; try the DNS-SD .local
3428 * hostname instead...
3429 */
3430
3431 snprintf(localname, sizeof(localname), "%s.local", DNSSDHostName);
3432
3433 ssl_options.ServerName = localname;
3434 ssl_options.ServerNameLen = strlen(localname);
3435
3436 cupsdLogMessage(CUPSD_LOG_DEBUG,
3437 "get_cdsa_certificate: Looking for certs for \"%s\"...",
3438 localname);
3439
3440 if (SecPolicySetValue(policy, &options))
3441 {
3442 cupsdLogMessage(CUPSD_LOG_ERROR,
3443 "Cannot set policy value to use for searching");
3444 CFRelease(keychain);
3445 CFRelease(policy_search);
3446 return (NULL);
3447 }
3448
3449 err = SecIdentitySearchCreateWithPolicy(policy, NULL, CSSM_KEYUSE_SIGN,
3450 keychain, FALSE, &search);
3451 }
3452
3453 # else
3454 /*
3455 * Assume there is exactly one SecIdentity in the keychain...
3456 */
3457
3458 err = SecIdentitySearchCreate(keychain, CSSM_KEYUSE_SIGN, &search);
3459 # endif /* HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY */
3460
3461 if (err)
3462 cupsdLogMessage(CUPSD_LOG_DEBUG,
3463 "Cannot create keychain search reference: %s (%d)",
3464 cssmErrorString(err), (int)err);
3465 else
3466 {
3467 if ((err = SecIdentitySearchCopyNext(search, &identity)))
3468 {
3469 cupsdLogMessage(CUPSD_LOG_DEBUG,
3470 "Cannot find signing key in keychain \"%s\": %s (%d)",
3471 ServerCertificate, cssmErrorString(err), (int)err);
3472 }
3473 else
3474 {
3475 if (CFGetTypeID(identity) != SecIdentityGetTypeID())
3476 cupsdLogMessage(CUPSD_LOG_ERROR,
3477 "SecIdentitySearchCopyNext CFTypeID failure!");
3478 else
3479 {
3480 if ((certificates = CFArrayCreate(NULL, (const void **)&identity,
3481 1, &kCFTypeArrayCallBacks)) == NULL)
3482 cupsdLogMessage(CUPSD_LOG_ERROR, "Cannot create certificate array");
3483 }
3484
3485 CFRelease(identity);
3486 }
3487
3488 CFRelease(search);
3489 }
3490
3491 # if HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY
3492 CFRelease(policy);
3493 CFRelease(policy_search);
3494 # endif /* HAVE_SECIDENTITYSEARCHCREATEWITHPOLICY */
3495
3496 return (certificates);
3497 }
3498 #endif /* HAVE_CDSASSL */
3499
3500
3501 /*
3502 * 'get_file()' - Get a filename and state info.
3503 */
3504
3505 static char * /* O - Real filename */
3506 get_file(cupsd_client_t *con, /* I - Client connection */
3507 struct stat *filestats, /* O - File information */
3508 char *filename, /* IO - Filename buffer */
3509 int len) /* I - Buffer length */
3510 {
3511 int status; /* Status of filesystem calls */
3512 char *ptr; /* Pointer info filename */
3513 int plen; /* Remaining length after pointer */
3514 char language[7]; /* Language subdirectory, if any */
3515
3516
3517 /*
3518 * Figure out the real filename...
3519 */
3520
3521 language[0] = '\0';
3522
3523 if (!strncmp(con->uri, "/ppd/", 5))
3524 snprintf(filename, len, "%s%s", ServerRoot, con->uri);
3525 else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/'))
3526 snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5);
3527 else if (!strncmp(con->uri, "/admin/conf/", 12))
3528 snprintf(filename, len, "%s%s", ServerRoot, con->uri + 11);
3529 else if (!strncmp(con->uri, "/admin/log/", 11))
3530 {
3531 if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/')
3532 strlcpy(filename, AccessLog, len);
3533 else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/')
3534 strlcpy(filename, ErrorLog, len);
3535 else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/')
3536 strlcpy(filename, PageLog, len);
3537 else
3538 return (NULL);
3539 }
3540 else if (con->language)
3541 {
3542 snprintf(language, sizeof(language), "/%s", con->language->language);
3543 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3544 }
3545 else
3546 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3547
3548 if ((ptr = strchr(filename, '?')) != NULL)
3549 *ptr = '\0';
3550
3551 /*
3552 * Grab the status for this language; if there isn't a language-specific file
3553 * then fallback to the default one...
3554 */
3555
3556 if ((status = stat(filename, filestats)) != 0 && language[0] &&
3557 strncmp(con->uri, "/ppd/", 5) &&
3558 strncmp(con->uri, "/admin/conf/", 12) &&
3559 strncmp(con->uri, "/admin/log/", 11))
3560 {
3561 /*
3562 * Drop the country code...
3563 */
3564
3565 language[3] = '\0';
3566 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3567
3568 if ((ptr = strchr(filename, '?')) != NULL)
3569 *ptr = '\0';
3570
3571 if ((status = stat(filename, filestats)) != 0)
3572 {
3573 /*
3574 * Drop the language prefix and try the root directory...
3575 */
3576
3577 language[0] = '\0';
3578 snprintf(filename, len, "%s%s", DocumentRoot, con->uri);
3579
3580 if ((ptr = strchr(filename, '?')) != NULL)
3581 *ptr = '\0';
3582
3583 status = stat(filename, filestats);
3584 }
3585 }
3586
3587 /*
3588 * If we're found a directory, get the index.html file instead...
3589 */
3590
3591 if (!status && S_ISDIR(filestats->st_mode))
3592 {
3593 /*
3594 * Make sure the URI ends with a slash...
3595 */
3596
3597 if (con->uri[strlen(con->uri) - 1] != '/')
3598 strlcat(con->uri, "/", sizeof(con->uri));
3599
3600 /*
3601 * Find the directory index file, trying every language...
3602 */
3603
3604 do
3605 {
3606 if (status && language[0])
3607 {
3608 /*
3609 * Try a different language subset...
3610 */
3611
3612 if (language[3])
3613 language[0] = '\0'; /* Strip country code */
3614 else
3615 language[0] = '\0'; /* Strip language */
3616 }
3617
3618 /*
3619 * Look for the index file...
3620 */
3621
3622 snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri);
3623
3624 if ((ptr = strchr(filename, '?')) != NULL)
3625 *ptr = '\0';
3626
3627 ptr = filename + strlen(filename);
3628 plen = len - (ptr - filename);
3629
3630 strlcpy(ptr, "index.html", plen);
3631 status = stat(filename, filestats);
3632
3633 #ifdef HAVE_JAVA
3634 if (status)
3635 {
3636 strlcpy(ptr, "index.class", plen);
3637 status = stat(filename, filestats);
3638 }
3639 #endif /* HAVE_JAVA */
3640
3641 #ifdef HAVE_PERL
3642 if (status)
3643 {
3644 strlcpy(ptr, "index.pl", plen);
3645 status = stat(filename, filestats);
3646 }
3647 #endif /* HAVE_PERL */
3648
3649 #ifdef HAVE_PHP
3650 if (status)
3651 {
3652 strlcpy(ptr, "index.php", plen);
3653 status = stat(filename, filestats);
3654 }
3655 #endif /* HAVE_PHP */
3656
3657 #ifdef HAVE_PYTHON
3658 if (status)
3659 {
3660 strlcpy(ptr, "index.pyc", plen);
3661 status = stat(filename, filestats);
3662 }
3663
3664 if (status)
3665 {
3666 strlcpy(ptr, "index.py", plen);
3667 status = stat(filename, filestats);
3668 }
3669 #endif /* HAVE_PYTHON */
3670
3671 }
3672 while (status && language[0]);
3673 }
3674
3675 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3676 "get_file(con=%p(%d), filestats=%p, filename=%p, len=%d) = "
3677 "%s", con, con->http.fd, filestats, filename, len,
3678 status ? "(null)" : filename);
3679
3680 if (status)
3681 return (NULL);
3682 else
3683 return (filename);
3684 }
3685
3686
3687 /*
3688 * 'install_conf_file()' - Install a configuration file.
3689 */
3690
3691 static http_status_t /* O - Status */
3692 install_conf_file(cupsd_client_t *con) /* I - Connection */
3693 {
3694 cups_file_t *in, /* Input file */
3695 *out; /* Output file */
3696 char buffer[1024]; /* Copy buffer */
3697 int bytes; /* Number of bytes */
3698 char conffile[1024], /* Configuration filename */
3699 newfile[1024], /* New config filename */
3700 oldfile[1024]; /* Old config filename */
3701 struct stat confinfo; /* Config file info */
3702
3703
3704 /*
3705 * First construct the filenames...
3706 */
3707
3708 snprintf(conffile, sizeof(conffile), "%s%s", ServerRoot, con->uri + 11);
3709 snprintf(newfile, sizeof(newfile), "%s%s.N", ServerRoot, con->uri + 11);
3710 snprintf(oldfile, sizeof(oldfile), "%s%s.O", ServerRoot, con->uri + 11);
3711
3712 cupsdLogMessage(CUPSD_LOG_INFO, "Installing config file \"%s\"...", conffile);
3713
3714 /*
3715 * Get the owner, group, and permissions of the configuration file.
3716 * If it doesn't exist, assign it to the User and Group in the
3717 * cupsd.conf file with mode 0640 permissions.
3718 */
3719
3720 if (stat(conffile, &confinfo))
3721 {
3722 confinfo.st_uid = User;
3723 confinfo.st_gid = Group;
3724 confinfo.st_mode = ConfigFilePerm;
3725 }
3726
3727 /*
3728 * Open the request file and new config file...
3729 */
3730
3731 if ((in = cupsFileOpen(con->filename, "rb")) == NULL)
3732 {
3733 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open request file \"%s\" - %s",
3734 con->filename, strerror(errno));
3735 return (HTTP_SERVER_ERROR);
3736 }
3737
3738 if ((out = cupsFileOpen(newfile, "wb")) == NULL)
3739 {
3740 cupsFileClose(in);
3741 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open config file \"%s\" - %s",
3742 newfile, strerror(errno));
3743 return (HTTP_SERVER_ERROR);
3744 }
3745
3746 fchmod(cupsFileNumber(out), confinfo.st_mode);
3747 fchown(cupsFileNumber(out), confinfo.st_uid, confinfo.st_gid);
3748
3749 /*
3750 * Copy from the request to the new config file...
3751 */
3752
3753 while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0)
3754 if (cupsFileWrite(out, buffer, bytes) < bytes)
3755 {
3756 cupsdLogMessage(CUPSD_LOG_ERROR,
3757 "Unable to copy to config file \"%s\" - %s",
3758 newfile, strerror(errno));
3759
3760 cupsFileClose(in);
3761 cupsFileClose(out);
3762 unlink(newfile);
3763
3764 return (HTTP_SERVER_ERROR);
3765 }
3766
3767 /*
3768 * Close the files...
3769 */
3770
3771 cupsFileClose(in);
3772 if (cupsFileClose(out))
3773 {
3774 cupsdLogMessage(CUPSD_LOG_ERROR,
3775 "Error file closing config file \"%s\" - %s",
3776 newfile, strerror(errno));
3777
3778 unlink(newfile);
3779
3780 return (HTTP_SERVER_ERROR);
3781 }
3782
3783 /*
3784 * Remove the request file...
3785 */
3786
3787 unlink(con->filename);
3788 cupsdClearString(&con->filename);
3789
3790 /*
3791 * Unlink the old backup, rename the current config file to the backup
3792 * filename, and rename the new config file to the config file name...
3793 */
3794
3795 if (unlink(oldfile))
3796 if (errno != ENOENT)
3797 {
3798 cupsdLogMessage(CUPSD_LOG_ERROR,
3799 "Unable to remove backup config file \"%s\" - %s",
3800 oldfile, strerror(errno));
3801
3802 unlink(newfile);
3803
3804 return (HTTP_SERVER_ERROR);
3805 }
3806
3807 if (rename(conffile, oldfile))
3808 if (errno != ENOENT)
3809 {
3810 cupsdLogMessage(CUPSD_LOG_ERROR,
3811 "Unable to rename old config file \"%s\" - %s",
3812 conffile, strerror(errno));
3813
3814 unlink(newfile);
3815
3816 return (HTTP_SERVER_ERROR);
3817 }
3818
3819 if (rename(newfile, conffile))
3820 {
3821 cupsdLogMessage(CUPSD_LOG_ERROR,
3822 "Unable to rename new config file \"%s\" - %s",
3823 newfile, strerror(errno));
3824
3825 rename(oldfile, conffile);
3826 unlink(newfile);
3827
3828 return (HTTP_SERVER_ERROR);
3829 }
3830
3831 /*
3832 * If the cupsd.conf file was updated, set the NeedReload flag...
3833 */
3834
3835 if (!strcmp(con->uri, "/admin/conf/cupsd.conf"))
3836 NeedReload = RELOAD_CUPSD;
3837 else
3838 NeedReload = RELOAD_ALL;
3839
3840 ReloadTime = time(NULL);
3841
3842 /*
3843 * Return that the file was created successfully...
3844 */
3845
3846 return (HTTP_CREATED);
3847 }
3848
3849
3850 /*
3851 * 'is_cgi()' - Is the resource a CGI script/program?
3852 */
3853
3854 static int /* O - 1 = CGI, 0 = file */
3855 is_cgi(cupsd_client_t *con, /* I - Client connection */
3856 const char *filename, /* I - Real filename */
3857 struct stat *filestats, /* I - File information */
3858 mime_type_t *type) /* I - MIME type */
3859 {
3860 const char *options; /* Options on URL */
3861
3862
3863 /*
3864 * Get the options, if any...
3865 */
3866
3867 if ((options = strchr(con->uri, '?')) != NULL)
3868 {
3869 options ++;
3870 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options);
3871 }
3872
3873 /*
3874 * Check for known types...
3875 */
3876
3877 if (!type || strcasecmp(type->super, "application"))
3878 {
3879 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3880 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3881 "type=%s/%s) = 0", con, con->http.fd, filename, filestats,
3882 type ? type->super : "unknown",
3883 type ? type->type : "unknown");
3884 return (0);
3885 }
3886
3887 if (!strcasecmp(type->type, "x-httpd-cgi") &&
3888 (filestats->st_mode & 0111))
3889 {
3890 /*
3891 * "application/x-httpd-cgi" is a CGI script.
3892 */
3893
3894 cupsdSetString(&con->command, filename);
3895
3896 if (options)
3897 cupsdSetStringf(&con->options, " %s", options);
3898
3899 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3900 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3901 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3902 type ? type->super : "unknown",
3903 type ? type->type : "unknown");
3904 return (1);
3905 }
3906 #ifdef HAVE_JAVA
3907 else if (!strcasecmp(type->type, "x-httpd-java"))
3908 {
3909 /*
3910 * "application/x-httpd-java" is a Java servlet.
3911 */
3912
3913 cupsdSetString(&con->command, CUPS_JAVA);
3914
3915 if (options)
3916 cupsdSetStringf(&con->options, " %s %s", filename, options);
3917 else
3918 cupsdSetStringf(&con->options, " %s", filename);
3919
3920 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3921 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3922 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3923 type ? type->super : "unknown",
3924 type ? type->type : "unknown");
3925 return (1);
3926 }
3927 #endif /* HAVE_JAVA */
3928 #ifdef HAVE_PERL
3929 else if (!strcasecmp(type->type, "x-httpd-perl"))
3930 {
3931 /*
3932 * "application/x-httpd-perl" is a Perl page.
3933 */
3934
3935 cupsdSetString(&con->command, CUPS_PERL);
3936
3937 if (options)
3938 cupsdSetStringf(&con->options, " %s %s", filename, options);
3939 else
3940 cupsdSetStringf(&con->options, " %s", filename);
3941
3942 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3943 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3944 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3945 type ? type->super : "unknown",
3946 type ? type->type : "unknown");
3947 return (1);
3948 }
3949 #endif /* HAVE_PERL */
3950 #ifdef HAVE_PHP
3951 else if (!strcasecmp(type->type, "x-httpd-php"))
3952 {
3953 /*
3954 * "application/x-httpd-php" is a PHP page.
3955 */
3956
3957 cupsdSetString(&con->command, CUPS_PHP);
3958
3959 if (options)
3960 cupsdSetStringf(&con->options, " %s %s", filename, options);
3961 else
3962 cupsdSetStringf(&con->options, " %s", filename);
3963
3964 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3965 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3966 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3967 type ? type->super : "unknown",
3968 type ? type->type : "unknown");
3969 return (1);
3970 }
3971 #endif /* HAVE_PHP */
3972 #ifdef HAVE_PYTHON
3973 else if (!strcasecmp(type->type, "x-httpd-python"))
3974 {
3975 /*
3976 * "application/x-httpd-python" is a Python page.
3977 */
3978
3979 cupsdSetString(&con->command, CUPS_PYTHON);
3980
3981 if (options)
3982 cupsdSetStringf(&con->options, " %s %s", filename, options);
3983 else
3984 cupsdSetStringf(&con->options, " %s", filename);
3985
3986 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3987 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3988 "type=%s/%s) = 1", con, con->http.fd, filename, filestats,
3989 type ? type->super : "unknown",
3990 type ? type->type : "unknown");
3991 return (1);
3992 }
3993 #endif /* HAVE_PYTHON */
3994
3995 cupsdLogMessage(CUPSD_LOG_DEBUG2,
3996 "is_cgi(con=%p(%d), filename=\"%s\", filestats=%p, "
3997 "type=%s/%s) = 0", con, con->http.fd, filename, filestats,
3998 type ? type->super : "unknown",
3999 type ? type->type : "unknown");
4000 return (0);
4001 }
4002
4003
4004 /*
4005 * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. "..").
4006 */
4007
4008 static int /* O - 0 if relative, 1 if absolute */
4009 is_path_absolute(const char *path) /* I - Input path */
4010 {
4011 /*
4012 * Check for a leading slash...
4013 */
4014
4015 if (path[0] != '/')
4016 return (0);
4017
4018 /*
4019 * Check for "/.." in the path...
4020 */
4021
4022 while ((path = strstr(path, "/..")) != NULL)
4023 {
4024 if (!path[3] || path[3] == '/')
4025 return (0);
4026
4027 path ++;
4028 }
4029
4030 /*
4031 * If we haven't found any relative paths, return 1 indicating an
4032 * absolute path...
4033 */
4034
4035 return (1);
4036 }
4037
4038
4039 #ifdef HAVE_SSL
4040 /*
4041 * 'make_certificate()' - Make a self-signed SSL/TLS certificate.
4042 */
4043
4044 static int /* O - 1 on success, 0 on failure */
4045 make_certificate(cupsd_client_t *con) /* I - Client connection */
4046 {
4047 #if defined(HAVE_LIBSSL) && defined(HAVE_WAITPID)
4048 int pid, /* Process ID of command */
4049 status; /* Status of command */
4050 char command[1024], /* Command */
4051 *argv[12], /* Command-line arguments */
4052 *envp[MAX_ENV + 1], /* Environment variables */
4053 infofile[1024], /* Type-in information for cert */
4054 seedfile[1024]; /* Random number seed file */
4055 int envc, /* Number of environment variables */
4056 bytes; /* Bytes written */
4057 cups_file_t *fp; /* Seed/info file */
4058 int infofd; /* Info file descriptor */
4059
4060
4061 /*
4062 * Run the "openssl" command to seed the random number generator and
4063 * generate a self-signed certificate that is good for 10 years:
4064 *
4065 * openssl rand -rand seedfile 1
4066 *
4067 * openssl req -new -x509 -keyout ServerKey \
4068 * -out ServerCertificate -days 3650 -nodes
4069 *
4070 * The seeding step is crucial in ensuring that the openssl command
4071 * does not block on systems without sufficient entropy...
4072 */
4073
4074 if (!cupsFileFind("openssl", getenv("PATH"), 1, command, sizeof(command)))
4075 {
4076 cupsdLogMessage(CUPSD_LOG_ERROR,
4077 "No SSL certificate and openssl command not found!");
4078 return (0);
4079 }
4080
4081 if (access("/dev/urandom", 0))
4082 {
4083 /*
4084 * If the system doesn't provide /dev/urandom, then any random source
4085 * will probably be blocking-style, so generate some random data to
4086 * use as a seed for the certificate. Note that we have already
4087 * seeded the random number generator in cupsdInitCerts()...
4088 */
4089
4090 cupsdLogMessage(CUPSD_LOG_INFO,
4091 "Seeding the random number generator...");
4092
4093 /*
4094 * Write the seed file...
4095 */
4096
4097 if ((fp = cupsTempFile2(seedfile, sizeof(seedfile))) == NULL)
4098 {
4099 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create seed file %s - %s",
4100 seedfile, strerror(errno));
4101 return (0);
4102 }
4103
4104 for (bytes = 0; bytes < 262144; bytes ++)
4105 cupsFilePutChar(fp, random());
4106
4107 cupsFileClose(fp);
4108
4109 /*
4110 * Run the openssl command to seed its random number generator...
4111 */
4112
4113 argv[0] = "openssl";
4114 argv[1] = "rand";
4115 argv[2] = "-rand";
4116 argv[3] = seedfile;
4117 argv[4] = "1";
4118 argv[5] = NULL;
4119
4120 envc = cupsdLoadEnv(envp, MAX_ENV);
4121 envp[envc] = NULL;
4122
4123 if (!cupsdStartProcess(command, argv, envp, -1, -1, -1, -1, -1, 1, NULL,
4124 NULL, &pid))
4125 {
4126 unlink(seedfile);
4127 return (0);
4128 }
4129
4130 while (waitpid(pid, &status, 0) < 0)
4131 if (errno != EINTR)
4132 {
4133 status = 1;
4134 break;
4135 }
4136
4137 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4138
4139 /*
4140 * Remove the seed file, as it is no longer needed...
4141 */
4142
4143 unlink(seedfile);
4144
4145 if (status)
4146 {
4147 if (WIFEXITED(status))
4148 cupsdLogMessage(CUPSD_LOG_ERROR,
4149 "Unable to seed random number generator - "
4150 "the openssl command stopped with status %d!",
4151 WEXITSTATUS(status));
4152 else
4153 cupsdLogMessage(CUPSD_LOG_ERROR,
4154 "Unable to seed random number generator - "
4155 "the openssl command crashed on signal %d!",
4156 WTERMSIG(status));
4157
4158 return (0);
4159 }
4160 }
4161
4162 /*
4163 * Create a file with the certificate information fields...
4164 *
4165 * Note: This assumes that the default questions are asked by the openssl
4166 * command...
4167 */
4168
4169 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
4170 {
4171 cupsdLogMessage(CUPSD_LOG_ERROR,
4172 "Unable to create certificate information file %s - %s",
4173 infofile, strerror(errno));
4174 return (0);
4175 }
4176
4177 cupsFilePrintf(fp, ".\n.\n.\n%s\n.\n%s\n%s\n",
4178 ServerName, ServerName, ServerAdmin);
4179 cupsFileClose(fp);
4180
4181 cupsdLogMessage(CUPSD_LOG_INFO,
4182 "Generating SSL server key and certificate...");
4183
4184 argv[0] = "openssl";
4185 argv[1] = "req";
4186 argv[2] = "-new";
4187 argv[3] = "-x509";
4188 argv[4] = "-keyout";
4189 argv[5] = ServerKey;
4190 argv[6] = "-out";
4191 argv[7] = ServerCertificate;
4192 argv[8] = "-days";
4193 argv[9] = "3650";
4194 argv[10] = "-nodes";
4195 argv[11] = NULL;
4196
4197 cupsdLoadEnv(envp, MAX_ENV);
4198
4199 infofd = open(infofile, O_RDONLY);
4200
4201 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, -1, 1, NULL,
4202 NULL, &pid))
4203 {
4204 close(infofd);
4205 unlink(infofile);
4206 return (0);
4207 }
4208
4209 close(infofd);
4210 unlink(infofile);
4211
4212 while (waitpid(pid, &status, 0) < 0)
4213 if (errno != EINTR)
4214 {
4215 status = 1;
4216 break;
4217 }
4218
4219 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4220
4221 if (status)
4222 {
4223 if (WIFEXITED(status))
4224 cupsdLogMessage(CUPSD_LOG_ERROR,
4225 "Unable to create SSL server key and certificate - "
4226 "the openssl command stopped with status %d!",
4227 WEXITSTATUS(status));
4228 else
4229 cupsdLogMessage(CUPSD_LOG_ERROR,
4230 "Unable to create SSL server key and certificate - "
4231 "the openssl command crashed on signal %d!",
4232 WTERMSIG(status));
4233 }
4234 else
4235 {
4236 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
4237 ServerKey);
4238 cupsdLogMessage(CUPSD_LOG_INFO,
4239 "Created SSL server certificate file \"%s\"...",
4240 ServerCertificate);
4241 }
4242
4243 return (!status);
4244
4245 #elif defined(HAVE_GNUTLS)
4246 gnutls_x509_crt crt; /* Self-signed certificate */
4247 gnutls_x509_privkey key; /* Encryption key */
4248 cups_lang_t *language; /* Default language info */
4249 cups_file_t *fp; /* Key/cert file */
4250 unsigned char buffer[8192]; /* Buffer for x509 data */
4251 size_t bytes; /* Number of bytes of data */
4252 unsigned char serial[4]; /* Serial number buffer */
4253 time_t curtime; /* Current time */
4254 int result; /* Result of GNU TLS calls */
4255
4256
4257 /*
4258 * Create the encryption key...
4259 */
4260
4261 cupsdLogMessage(CUPSD_LOG_INFO, "Generating SSL server key...");
4262
4263 gnutls_x509_privkey_init(&key);
4264 gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0);
4265
4266 /*
4267 * Save it...
4268 */
4269
4270 bytes = sizeof(buffer);
4271
4272 if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM,
4273 buffer, &bytes)) < 0)
4274 {
4275 cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to export SSL server key - %s",
4276 gnutls_strerror(result));
4277 gnutls_x509_privkey_deinit(key);
4278 return (0);
4279 }
4280 else if ((fp = cupsFileOpen(ServerKey, "w")) != NULL)
4281 {
4282 cupsFileWrite(fp, (char *)buffer, bytes);
4283 cupsFileClose(fp);
4284
4285 cupsdLogMessage(CUPSD_LOG_INFO, "Created SSL server key file \"%s\"...",
4286 ServerKey);
4287 }
4288 else
4289 {
4290 cupsdLogMessage(CUPSD_LOG_ERROR,
4291 "Unable to create SSL server key file \"%s\" - %s",
4292 ServerKey, strerror(errno));
4293 gnutls_x509_privkey_deinit(key);
4294 return (0);
4295 }
4296
4297 /*
4298 * Create the self-signed certificate...
4299 */
4300
4301 cupsdLogMessage(CUPSD_LOG_INFO, "Generating self-signed SSL certificate...");
4302
4303 language = cupsLangDefault();
4304 curtime = time(NULL);
4305 serial[0] = curtime >> 24;
4306 serial[1] = curtime >> 16;
4307 serial[2] = curtime >> 8;
4308 serial[3] = curtime;
4309
4310 gnutls_x509_crt_init(&crt);
4311 if (strlen(language->language) == 5)
4312 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
4313 language->language + 3, 2);
4314 else
4315 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0,
4316 "US", 2);
4317 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0,
4318 ServerName, strlen(ServerName));
4319 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0,
4320 ServerName, strlen(ServerName));
4321 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME,
4322 0, "Unknown", 7);
4323 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0,
4324 "Unknown", 7);
4325 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0,
4326 "Unknown", 7);
4327 gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0,
4328 ServerAdmin, strlen(ServerAdmin));
4329 gnutls_x509_crt_set_key(crt, key);
4330 gnutls_x509_crt_set_serial(crt, serial, sizeof(serial));
4331 gnutls_x509_crt_set_activation_time(crt, curtime);
4332 gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400);
4333 gnutls_x509_crt_set_ca_status(crt, 0);
4334 gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME,
4335 ServerName);
4336 gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0);
4337 gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT);
4338 gnutls_x509_crt_set_version(crt, 3);
4339
4340 bytes = sizeof(buffer);
4341 if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0)
4342 gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes);
4343
4344 gnutls_x509_crt_sign(crt, crt, key);
4345
4346 /*
4347 * Save it...
4348 */
4349
4350 bytes = sizeof(buffer);
4351 if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM,
4352 buffer, &bytes)) < 0)
4353 cupsdLogMessage(CUPSD_LOG_ERROR,
4354 "Unable to export SSL server certificate - %s",
4355 gnutls_strerror(result));
4356 else if ((fp = cupsFileOpen(ServerCertificate, "w")) != NULL)
4357 {
4358 cupsFileWrite(fp, (char *)buffer, bytes);
4359 cupsFileClose(fp);
4360
4361 cupsdLogMessage(CUPSD_LOG_INFO,
4362 "Created SSL server certificate file \"%s\"...",
4363 ServerCertificate);
4364 }
4365 else
4366 cupsdLogMessage(CUPSD_LOG_ERROR,
4367 "Unable to create SSL server certificate file \"%s\" - %s",
4368 ServerCertificate, strerror(errno));
4369
4370 /*
4371 * Cleanup...
4372 */
4373
4374 gnutls_x509_crt_deinit(crt);
4375 gnutls_x509_privkey_deinit(key);
4376
4377 return (1);
4378
4379 #elif defined(HAVE_CDSASSL) && defined(HAVE_WAITPID)
4380 int pid, /* Process ID of command */
4381 status; /* Status of command */
4382 char command[1024], /* Command */
4383 *argv[4], /* Command-line arguments */
4384 *envp[MAX_ENV + 1], /* Environment variables */
4385 keychain[1024], /* Keychain argument */
4386 infofile[1024]; /* Type-in information for cert */
4387 cups_file_t *fp; /* Seed/info file */
4388 int infofd; /* Info file descriptor */
4389
4390
4391 /*
4392 * Run the "certtool" command to generate a self-signed certificate...
4393 */
4394
4395 if (!cupsFileFind("certtool", getenv("PATH"), 1, command, sizeof(command)))
4396 {
4397 cupsdLogMessage(CUPSD_LOG_ERROR,
4398 "No SSL certificate and certtool command not found!");
4399 return (0);
4400 }
4401
4402 /*
4403 * Create a file with the certificate information fields...
4404 *
4405 * Note: This assumes that the default questions are asked by the certtool
4406 * command...
4407 */
4408
4409 if ((fp = cupsTempFile2(infofile, sizeof(infofile))) == NULL)
4410 {
4411 cupsdLogMessage(CUPSD_LOG_ERROR,
4412 "Unable to create certificate information file %s - %s",
4413 infofile, strerror(errno));
4414 return (0);
4415 }
4416
4417 cupsFilePrintf(fp, "%s\nr\n\ny\nb\ns\ny\n%s\n\n\n\n\n%s\ny\n",
4418 con->servername, con->servername, ServerAdmin);
4419 cupsFileClose(fp);
4420
4421 cupsdLogMessage(CUPSD_LOG_INFO,
4422 "Generating SSL server key and certificate...");
4423
4424 snprintf(keychain, sizeof(keychain), "k=%s", ServerCertificate);
4425
4426 argv[0] = "certtool";
4427 argv[1] = "c";
4428 argv[2] = keychain;
4429 argv[3] = NULL;
4430
4431 cupsdLoadEnv(envp, MAX_ENV);
4432
4433 infofd = open(infofile, O_RDONLY);
4434
4435 if (!cupsdStartProcess(command, argv, envp, infofd, -1, -1, -1, -1, 1, NULL,
4436 NULL, &pid))
4437 {
4438 close(infofd);
4439 unlink(infofile);
4440 return (0);
4441 }
4442
4443 close(infofd);
4444 unlink(infofile);
4445
4446 while (waitpid(pid, &status, 0) < 0)
4447 if (errno != EINTR)
4448 {
4449 status = 1;
4450 break;
4451 }
4452
4453 cupsdFinishProcess(pid, command, sizeof(command), NULL);
4454
4455 if (status)
4456 {
4457 if (WIFEXITED(status))
4458 cupsdLogMessage(CUPSD_LOG_ERROR,
4459 "Unable to create SSL server key and certificate - "
4460 "the certtool command stopped with status %d!",
4461 WEXITSTATUS(status));
4462 else
4463 cupsdLogMessage(CUPSD_LOG_ERROR,
4464 "Unable to create SSL server key and certificate - "
4465 "the certtool command crashed on signal %d!",
4466 WTERMSIG(status));
4467 }
4468 else
4469 {
4470 cupsdLogMessage(CUPSD_LOG_INFO,
4471 "Created SSL server certificate file \"%s\"...",
4472 ServerCertificate);
4473 }
4474
4475 return (!status);
4476
4477 #else
4478 return (0);
4479 #endif /* HAVE_LIBSSL && HAVE_WAITPID */
4480 }
4481 #endif /* HAVE_SSL */
4482
4483
4484 /*
4485 * 'pipe_command()' - Pipe the output of a command to the remote client.
4486 */
4487
4488 static int /* O - Process ID */
4489 pipe_command(cupsd_client_t *con, /* I - Client connection */
4490 int infile, /* I - Standard input for command */
4491 int *outfile, /* O - Standard output for command */
4492 char *command, /* I - Command to run */
4493 char *options, /* I - Options for command */
4494 int root) /* I - Run as root? */
4495 {
4496 int i; /* Looping var */
4497 int pid; /* Process ID */
4498 char *commptr, /* Command string pointer */
4499 commch; /* Command string character */
4500 char *uriptr; /* URI string pointer */
4501 int fds[2]; /* Pipe FDs */
4502 int argc; /* Number of arguments */
4503 int envc; /* Number of environment variables */
4504 char argbuf[10240], /* Argument buffer */
4505 *argv[100], /* Argument strings */
4506 *envp[MAX_ENV + 20]; /* Environment variables */
4507 char auth_type[256], /* CUPSD_AUTH_TYPE environment variable */
4508 content_length[1024], /* CONTENT_LENGTH environment variable */
4509 content_type[1024], /* CONTENT_TYPE environment variable */
4510 http_cookie[32768], /* HTTP_COOKIE environment variable */
4511 http_referer[1024], /* HTTP_REFERER environment variable */
4512 http_user_agent[1024], /* HTTP_USER_AGENT environment variable */
4513 lang[1024], /* LANG environment variable */
4514 path_info[1024], /* PATH_INFO environment variable */
4515 remote_addr[1024], /* REMOTE_ADDR environment variable */
4516 remote_host[1024], /* REMOTE_HOST environment variable */
4517 remote_user[1024], /* REMOTE_USER environment variable */
4518 script_filename[1024], /* SCRIPT_FILENAME environment variable */
4519 script_name[1024], /* SCRIPT_NAME environment variable */
4520 server_name[1024], /* SERVER_NAME environment variable */
4521 server_port[1024]; /* SERVER_PORT environment variable */
4522 ipp_attribute_t *attr; /* attributes-natural-language attribute */
4523 void *ccache = NULL; /* Kerberos credentials */
4524
4525
4526 /*
4527 * Parse a copy of the options string, which is of the form:
4528 *
4529 * argument+argument+argument
4530 * ?argument+argument+argument
4531 * param=value&param=value
4532 * ?param=value&param=value
4533 * /name?argument+argument+argument
4534 * /name?param=value&param=value
4535 *
4536 * If the string contains an "=" character after the initial name,
4537 * then we treat it as a HTTP GET form request and make a copy of
4538 * the remaining string for the environment variable.
4539 *
4540 * The string is always parsed out as command-line arguments, to
4541 * be consistent with Apache...
4542 */
4543
4544 cupsdLogMessage(CUPSD_LOG_DEBUG2,
4545 "pipe_command(con=%p(%d), infile=%d, outfile=%p, "
4546 "command=\"%s\", options=\"%s\", root=%d)",
4547 con, con->http.fd, infile, outfile, command,
4548 options ? options : "(null)", root);
4549
4550 argv[0] = command;
4551
4552 if (options)
4553 strlcpy(argbuf, options, sizeof(argbuf));
4554 else
4555 argbuf[0] = '\0';
4556
4557 if (argbuf[0] == '/')
4558 {
4559 /*
4560 * Found some trailing path information, set PATH_INFO...
4561 */
4562
4563 if ((commptr = strchr(argbuf, '?')) == NULL)
4564 commptr = argbuf + strlen(argbuf);
4565
4566 commch = *commptr;
4567 *commptr = '\0';
4568 snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf);
4569 *commptr = commch;
4570 }
4571 else
4572 {
4573 commptr = argbuf;
4574 path_info[0] = '\0';
4575
4576 if (*commptr == ' ')
4577 commptr ++;
4578 }
4579
4580 if (*commptr == '?' && con->operation == HTTP_GET && !con->query_string)
4581 {
4582 commptr ++;
4583 cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr);
4584 }
4585
4586 argc = 1;
4587
4588 if (*commptr)
4589 {
4590 argv[argc ++] = commptr;
4591
4592 for (; *commptr && argc < 99; commptr ++)
4593 {
4594 /*
4595 * Break arguments whenever we see a + or space...
4596 */
4597
4598 if (*commptr == ' ' || *commptr == '+')
4599 {
4600 while (*commptr == ' ' || *commptr == '+')
4601 *commptr++ = '\0';
4602
4603 /*
4604 * If we don't have a blank string, save it as another argument...
4605 */
4606
4607 if (*commptr)
4608 {
4609 argv[argc] = commptr;
4610 argc ++;
4611 }
4612 else
4613 break;
4614 }
4615 else if (*commptr == '%' && isxdigit(commptr[1] & 255) &&
4616 isxdigit(commptr[2] & 255))
4617 {
4618 /*
4619 * Convert the %xx notation to the individual character.
4620 */
4621
4622 if (commptr[1] >= '0' && commptr[1] <= '9')
4623 *commptr = (commptr[1] - '0') << 4;
4624 else
4625 *commptr = (tolower(commptr[1]) - 'a' + 10) << 4;
4626
4627 if (commptr[2] >= '0' && commptr[2] <= '9')
4628 *commptr |= commptr[2] - '0';
4629 else
4630 *commptr |= tolower(commptr[2]) - 'a' + 10;
4631
4632 _cups_strcpy(commptr + 1, commptr + 3);
4633
4634 /*
4635 * Check for a %00 and break if that is the case...
4636 */
4637
4638 if (!*commptr)
4639 break;
4640 }
4641 }
4642 }
4643
4644 argv[argc] = NULL;
4645
4646 /*
4647 * Setup the environment variables as needed...
4648 */
4649
4650 if (con->username[0])
4651 {
4652 snprintf(auth_type, sizeof(auth_type), "CUPSD_AUTH_TYPE=%s",
4653 httpGetField(HTTP(con), HTTP_FIELD_AUTHORIZATION));
4654
4655 if ((uriptr = strchr(auth_type + 10, ' ')) != NULL)
4656 *uriptr = '\0';
4657 }
4658 else
4659 auth_type[0] = '\0';
4660
4661 if (con->request &&
4662 (attr = ippFindAttribute(con->request, "attributes-natural-language",
4663 IPP_TAG_LANGUAGE)) != NULL)
4664 {
4665 switch (strlen(attr->values[0].string.text))
4666 {
4667 default :
4668 /*
4669 * This is an unknown or badly formatted language code; use
4670 * the POSIX locale...
4671 */
4672
4673 strcpy(lang, "LANG=C");
4674 break;
4675
4676 case 2 :
4677 /*
4678 * Just the language code (ll)...
4679 */
4680
4681 snprintf(lang, sizeof(lang), "LANG=%s.UTF8",
4682 attr->values[0].string.text);
4683 break;
4684
4685 case 5 :
4686 /*
4687 * Language and country code (ll-cc)...
4688 */
4689
4690 snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c.UTF8",
4691 attr->values[0].string.text[0],
4692 attr->values[0].string.text[1],
4693 toupper(attr->values[0].string.text[3] & 255),
4694 toupper(attr->values[0].string.text[4] & 255));
4695 break;
4696 }
4697 }
4698 else if (con->language)
4699 snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language);
4700 else
4701 strcpy(lang, "LANG=C");
4702
4703 strcpy(remote_addr, "REMOTE_ADDR=");
4704 httpAddrString(con->http.hostaddr, remote_addr + 12,
4705 sizeof(remote_addr) - 12);
4706
4707 snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s",
4708 con->http.hostname);
4709
4710 snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri);
4711 if ((uriptr = strchr(script_name, '?')) != NULL)
4712 *uriptr = '\0';
4713
4714 snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s",
4715 DocumentRoot, script_name + 12);
4716
4717 sprintf(server_port, "SERVER_PORT=%d", con->serverport);
4718
4719 snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s",
4720 con->servername);
4721
4722 envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));
4723
4724 if (auth_type[0])
4725 envp[envc ++] = auth_type;
4726
4727 envp[envc ++] = lang;
4728 envp[envc ++] = "REDIRECT_STATUS=1";
4729 envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1";
4730 envp[envc ++] = server_name;
4731 envp[envc ++] = server_port;
4732 envp[envc ++] = remote_addr;
4733 envp[envc ++] = remote_host;
4734 envp[envc ++] = script_name;
4735 envp[envc ++] = script_filename;
4736
4737 if (path_info[0])
4738 envp[envc ++] = path_info;
4739
4740 if (con->username[0])
4741 {
4742 snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username);
4743
4744 envp[envc ++] = remote_user;
4745
4746 /*
4747 * Save Kerberos credentials, if any...
4748 */
4749
4750 #ifdef HAVE_GSSAPI
4751 if (con->gss_creds)
4752 ccache = cupsdCopyKrb5Creds(con);
4753 #endif /* HAVE_GSSAPI */
4754 }
4755
4756 if (con->http.version == HTTP_1_1)
4757 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1";
4758 else if (con->http.version == HTTP_1_0)
4759 envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0";
4760 else
4761 envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9";
4762
4763 if (con->http.cookie)
4764 {
4765 snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s",
4766 con->http.cookie);
4767 envp[envc ++] = http_cookie;
4768 }
4769
4770 if (con->http.fields[HTTP_FIELD_USER_AGENT][0])
4771 {
4772 snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s",
4773 con->http.fields[HTTP_FIELD_USER_AGENT]);
4774 envp[envc ++] = http_user_agent;
4775 }
4776
4777 if (con->http.fields[HTTP_FIELD_REFERER][0])
4778 {
4779 snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s",
4780 con->http.fields[HTTP_FIELD_REFERER]);
4781 envp[envc ++] = http_referer;
4782 }
4783
4784 if (con->operation == HTTP_GET)
4785 {
4786 envp[envc ++] = "REQUEST_METHOD=GET";
4787
4788 if (con->query_string)
4789 {
4790 /*
4791 * Add GET form variables after ?...
4792 */
4793
4794 envp[envc ++] = con->query_string;
4795 }
4796 else
4797 envp[envc ++] = "QUERY_STRING=";
4798 }
4799 else
4800 {
4801 sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT,
4802 CUPS_LLCAST con->bytes);
4803 snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s",
4804 con->http.fields[HTTP_FIELD_CONTENT_TYPE]);
4805
4806 envp[envc ++] = "REQUEST_METHOD=POST";
4807 envp[envc ++] = content_length;
4808 envp[envc ++] = content_type;
4809 }
4810
4811 /*
4812 * Tell the CGI if we are using encryption...
4813 */
4814
4815 if (con->http.tls)
4816 envp[envc ++] = "HTTPS=ON";
4817
4818 /*
4819 * Terminate the environment array...
4820 */
4821
4822 envp[envc] = NULL;
4823
4824 if (LogLevel >= CUPSD_LOG_DEBUG)
4825 {
4826 for (i = 0; i < argc; i ++)
4827 cupsdLogMessage(CUPSD_LOG_DEBUG,
4828 "[CGI] argv[%d] = \"%s\"", i, argv[i]);
4829 for (i = 0; i < envc; i ++)
4830 cupsdLogMessage(CUPSD_LOG_DEBUG,
4831 "[CGI] envp[%d] = \"%s\"", i, envp[i]);
4832 }
4833
4834 /*
4835 * Create a pipe for the output...
4836 */
4837
4838 if (cupsdOpenPipe(fds))
4839 {
4840 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s",
4841 argv[0], strerror(errno));
4842 return (0);
4843 }
4844
4845 /*
4846 * Then execute the command...
4847 */
4848
4849 if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1],
4850 -1, -1, root, DefaultProfile, NULL, &pid) < 0)
4851 {
4852 /*
4853 * Error - can't fork!
4854 */
4855
4856 cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0],
4857 strerror(errno));
4858
4859 cupsdClosePipe(fds);
4860 pid = 0;
4861 }
4862 else
4863 {
4864 /*
4865 * Fork successful - return the PID...
4866 */
4867
4868 if (con->username[0])
4869 cupsdAddCert(pid, con->username, ccache);
4870
4871 cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid);
4872
4873 *outfile = fds[0];
4874 close(fds[1]);
4875 }
4876
4877 return (pid);
4878 }
4879
4880
4881 /*
4882 * 'valid_host()' - Is the Host: field valid?
4883 */
4884
4885 static int /* O - 1 if valid, 0 if not */
4886 valid_host(cupsd_client_t *con) /* I - Client connection */
4887 {
4888 cupsd_alias_t *a; /* Current alias */
4889 cupsd_netif_t *netif; /* Current network interface */
4890 const char *host, /* Host field */
4891 *end; /* End character */
4892
4893
4894 host = con->http.fields[HTTP_FIELD_HOST];
4895
4896 if (httpAddrLocalhost(con->http.hostaddr))
4897 {
4898 /*
4899 * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical
4900 * addresses when accessing CUPS via the loopback interface...
4901 */
4902
4903 return (!strcasecmp(host, "localhost") ||
4904 !strncasecmp(host, "localhost:", 10) ||
4905 !strcasecmp(host, "localhost.") ||
4906 !strncasecmp(host, "localhost.:", 11) ||
4907 #ifdef __linux
4908 !strcasecmp(host, "localhost.localdomain") ||
4909 !strncasecmp(host, "localhost.localdomain:", 22) ||
4910 #endif /* __linux */
4911 !strcmp(host, "127.0.0.1") ||
4912 !strncmp(host, "127.0.0.1:", 10) ||
4913 !strcmp(host, "[::1]") ||
4914 !strncmp(host, "[::1]:", 6));
4915 }
4916
4917 #ifdef HAVE_DNSSD
4918 /*
4919 * Check if the hostname is something.local (Bonjour); if so, allow it.
4920 */
4921
4922 if ((end = strrchr(host, '.')) != NULL &&
4923 (!strcasecmp(end, ".local") || !strncasecmp(end, ".local:", 7) ||
4924 !strcasecmp(end, ".local.") || !strncasecmp(end, ".local.:", 8)))
4925 return (1);
4926 #endif /* HAVE_DNSSD */
4927
4928 /*
4929 * Check if the hostname is an IP address...
4930 */
4931
4932 if (isdigit(*host & 255) || *host == '[')
4933 {
4934 /*
4935 * Possible IPv4/IPv6 address...
4936 */
4937
4938 char temp[1024], /* Temporary string */
4939 *ptr; /* Pointer into temporary string */
4940 http_addrlist_t *addrlist; /* List of addresses */
4941
4942
4943 strlcpy(temp, host, sizeof(temp));
4944 if ((ptr = strrchr(temp, ':')) != NULL && !strchr(ptr, ']'))
4945 *ptr = '\0'; /* Strip :port from host value */
4946
4947 if ((addrlist = httpAddrGetList(temp, AF_UNSPEC, NULL)) != NULL)
4948 {
4949 /*
4950 * Good IPv4/IPv6 address...
4951 */
4952
4953 httpAddrFreeList(addrlist);
4954 return (1);
4955 }
4956 }
4957
4958 /*
4959 * Check for (alias) name matches...
4960 */
4961
4962 for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias);
4963 a;
4964 a = (cupsd_alias_t *)cupsArrayNext(ServerAlias))
4965 {
4966 /*
4967 * "ServerAlias *" allows all host values through...
4968 */
4969
4970 if (!strcmp(a->name, "*"))
4971 return (1);
4972
4973 if (!strncasecmp(host, a->name, a->namelen))
4974 {
4975 /*
4976 * Prefix matches; check the character at the end - it must be ":", ".",
4977 * ".:", or nul...
4978 */
4979
4980 end = host + a->namelen;
4981
4982 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
4983 return (1);
4984 }
4985 }
4986
4987 #ifdef HAVE_DNSSD
4988 for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias);
4989 a;
4990 a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias))
4991 {
4992 /*
4993 * "ServerAlias *" allows all host values through...
4994 */
4995
4996 if (!strcmp(a->name, "*"))
4997 return (1);
4998
4999 if (!strncasecmp(host, a->name, a->namelen))
5000 {
5001 /*
5002 * Prefix matches; check the character at the end - it must be ":", ".",
5003 * ".:", or nul...
5004 */
5005
5006 end = host + a->namelen;
5007
5008 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
5009 return (1);
5010 }
5011 }
5012 #endif /* HAVE_DNSSD */
5013
5014 /*
5015 * Check for interface hostname matches...
5016 */
5017
5018 for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
5019 netif;
5020 netif = (cupsd_netif_t *)cupsArrayNext(NetIFList))
5021 {
5022 if (!strncasecmp(host, netif->hostname, netif->hostlen))
5023 {
5024 /*
5025 * Prefix matches; check the character at the end - it must be ":", ".",
5026 * ".:", or nul...
5027 */
5028
5029 end = host + netif->hostlen;
5030
5031 if (!*end || *end == ':' || (*end == '.' && (!end[1] || end[1] == ':')))
5032 return (1);
5033 }
5034 }
5035
5036 return (0);
5037 }
5038
5039
5040 /*
5041 * 'write_file()' - Send a file via HTTP.
5042 */
5043
5044 static int /* O - 0 on failure, 1 on success */
5045 write_file(cupsd_client_t *con, /* I - Client connection */
5046 http_status_t code, /* I - HTTP status */
5047 char *filename, /* I - Filename */
5048 char *type, /* I - File type */
5049 struct stat *filestats) /* O - File information */
5050 {
5051 con->file = open(filename, O_RDONLY);
5052
5053 cupsdLogMessage(CUPSD_LOG_DEBUG2,
5054 "write_file(con=%p(%d), code=%d, filename=\"%s\" (%d), "
5055 "type=\"%s\", filestats=%p)", con, con->http.fd,
5056 code, filename, con->file, type ? type : "(null)", filestats);
5057
5058 if (con->file < 0)
5059 return (0);
5060
5061 fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);
5062
5063 con->pipe_pid = 0;
5064
5065 if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE))
5066 return (0);
5067
5068 if (httpPrintf(HTTP(con), "Last-Modified: %s\r\n",
5069 httpGetDateString(filestats->st_mtime)) < 0)
5070 return (0);
5071 if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n",
5072 CUPS_LLCAST filestats->st_size) < 0)
5073 return (0);
5074 if (httpPrintf(HTTP(con), "\r\n") < 0)
5075 return (0);
5076
5077 if (cupsdFlushHeader(con) < 0)
5078 return (0);
5079
5080 con->http.data_encoding = HTTP_ENCODE_LENGTH;
5081 con->http.data_remaining = filestats->st_size;
5082
5083 if (con->http.data_remaining <= INT_MAX)
5084 con->http._data_remaining = con->http.data_remaining;
5085 else
5086 con->http._data_remaining = INT_MAX;
5087
5088 cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
5089 (cupsd_selfunc_t)cupsdWriteClient, con);
5090
5091 return (1);
5092 }
5093
5094
5095 /*
5096 * 'write_pipe()' - Flag that data is available on the CGI pipe.
5097 */
5098
5099 static void
5100 write_pipe(cupsd_client_t *con) /* I - Client connection */
5101 {
5102 cupsdLogMessage(CUPSD_LOG_DEBUG2,
5103 "write_pipe(con=%p(%d)) CGI output on fd %d",
5104 con, con->http.fd, con->file);
5105
5106 con->file_ready = 1;
5107
5108 cupsdRemoveSelect(con->file);
5109 cupsdAddSelect(con->http.fd, NULL, (cupsd_selfunc_t)cupsdWriteClient, con);
5110 }
5111
5112
5113 /*
5114 * End of "$Id: client.c 7950 2008-09-17 00:21:59Z mike $".
5115 */
Unnamed repository; edit this file 'description' to name the repository.